164780831 has 2 divisors, whose sum is σ = 164780832. Its totient is φ = 164780830.

The previous prime is 164780827. The next prime is 164780851. The reversal of 164780831 is 138087461.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 164780831 - 2² = 164780827 is a prime.

It is a super-2 number, since 2×164780831² = 54305444530101122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (164780821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82390415 + 82390416.

It is an arithmetic number, because the mean of its divisors is an integer number (82390416).

Almost surely, 2^164780831 is an apocalyptic number.

164780831 is a deficient number, since it is larger than the sum of its proper divisors (1).

164780831 is an equidigital number, since it uses as much as digits as its factorization.

164780831 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32256, while the sum is 38.

The square root of 164780831 is about 12836.6986020550. The cubic root of 164780831 is about 548.2376992415.

The spelling of 164780831 in words is "one hundred sixty-four million, seven hundred eighty thousand, eight hundred thirty-one".