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106875721 = 376147353
BaseRepresentation
bin1100101111011…
…00101101001001
321110002211221001
412113230231021
5204330010341
614334415001
72435300011
oct627545511
9243084831
10106875721
1155368347
122b961461
13191b0294
14102a0c41
1595b1d31
hex65ecb49

106875721 has 8 divisors (see below), whose sum is σ = 111566024. Its totient is φ = 102280320.

The previous prime is 106875673. The next prime is 106875737. The reversal of 106875721 is 127578601.

It is the 4221-st star number.

It can be written as a sum of positive squares in 4 ways, for example, as 373321 + 106502400 = 611^2 + 10320^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-106875721 is a prime.

It is a super-2 number, since 2×1068757212 = 22844839478539682, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (106875751) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21420 + ... + 25933.

It is an arithmetic number, because the mean of its divisors is an integer number (13945753).

Almost surely, 2106875721 is an apocalyptic number.

It is an amenable number.

106875721 is a deficient number, since it is larger than the sum of its proper divisors (4690303).

106875721 is an equidigital number, since it uses as much as digits as its factorization.

106875721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47451.

The product of its (nonzero) digits is 23520, while the sum is 37.

The square root of 106875721 is about 10338.0714352339. The cubic root of 106875721 is about 474.5620650600.

The spelling of 106875721 in words is "one hundred six million, eight hundred seventy-five thousand, seven hundred twenty-one".

Divisors: 1 37 61 2257 47353 1752061 2888533 106875721