164787131 has 2 divisors, whose sum is σ = 164787132. Its totient is φ = 164787130.

The previous prime is 164787101. The next prime is 164787143. The reversal of 164787131 is 131787461.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 164787131 - 2²² = 160592827 is a prime.

It is a super-2 number, since 2×164787131² = 54309597086422322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (164787101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82393565 + 82393566.

It is an arithmetic number, because the mean of its divisors is an integer number (82393566).

Almost surely, 2^164787131 is an apocalyptic number.

164787131 is a deficient number, since it is larger than the sum of its proper divisors (1).

164787131 is an equidigital number, since it uses as much as digits as its factorization.

164787131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28224, while the sum is 38.

The square root of 164787131 is about 12836.9439899066. The cubic root of 164787131 is about 548.2446860038.

The spelling of 164787131 in words is "one hundred sixty-four million, seven hundred eighty-seven thousand, one hundred thirty-one".