164336891 has 2 divisors, whose sum is σ = 164336892. Its totient is φ = 164336890.

The previous prime is 164336831. The next prime is 164336903. The reversal of 164336891 is 198633461.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-164336891 is a prime.

It is a super-2 number, since 2×164336891² = 54013227487091762, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (164336831) 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, 82168445 + 82168446.

It is an arithmetic number, because the mean of its divisors is an integer number (82168446).

Almost surely, 2^164336891 is an apocalyptic number.

164336891 is a deficient number, since it is larger than the sum of its proper divisors (1).

164336891 is an equidigital number, since it uses as much as digits as its factorization.

164336891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 93312, while the sum is 41.

The square root of 164336891 is about 12819.3951105347. The cubic root of 164336891 is about 547.7449163129.

The spelling of 164336891 in words is "one hundred sixty-four million, three hundred thirty-six thousand, eight hundred ninety-one".