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4631905 = 51754493
BaseRepresentation
bin10001101010110101100001
322201022210001
4101222311201
52141210110
6243140001
754241045
oct21526541
98638701
104631905
112684023
121674601
13c62395
14888025
1561763a

4631905 has 8 divisors (see below), whose sum is σ = 5885352. Its totient is φ = 3487488.

The previous prime is 4631903. The next prime is 4631987. The reversal of 4631905 is 5091364.

It can be written as a sum of positive squares in 4 ways, for example, as 506944 + 4124961 = 712^2 + 2031^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 4631905 - 21 = 4631903 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4631903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27162 + ... + 27331.

It is an arithmetic number, because the mean of its divisors is an integer number (735669).

Almost surely, 24631905 is an apocalyptic number.

It is an amenable number.

4631905 is a deficient number, since it is larger than the sum of its proper divisors (1253447).

4631905 is a wasteful number, since it uses less digits than its factorization.

4631905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54515.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 4631905 is about 2152.1860979014. The cubic root of 4631905 is about 166.6939666391.

The spelling of 4631905 in words is "four million, six hundred thirty-one thousand, nine hundred five".

Divisors: 1 5 17 85 54493 272465 926381 4631905