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164711983 = 206379841
BaseRepresentation
bin10011101000101…
…00111000101111
3102110221020100211
421310110320233
5314131240413
624202203251
74040012602
oct1164247057
9373836324
10164711983
1184a80607
12471b3527
1328180417
1417c38339
15e6d883d
hex9d14e2f

164711983 has 4 divisors (see below), whose sum is σ = 164793888. Its totient is φ = 164630080.

The previous prime is 164711957. The next prime is 164711999. The reversal of 164711983 is 389117461.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-164711983 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164711083) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37858 + ... + 41983.

It is an arithmetic number, because the mean of its divisors is an integer number (41198472).

Almost surely, 2164711983 is an apocalyptic number.

164711983 is a deficient number, since it is larger than the sum of its proper divisors (81905).

164711983 is an equidigital number, since it uses as much as digits as its factorization.

164711983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81904.

The product of its digits is 36288, while the sum is 40.

The square root of 164711983 is about 12834.0166354887. The cubic root of 164711983 is about 548.1613345193.

The spelling of 164711983 in words is "one hundred sixty-four million, seven hundred eleven thousand, nine hundred eighty-three".

Divisors: 1 2063 79841 164711983