164631899 has 2 divisors, whose sum is σ = 164631900. Its totient is φ = 164631898.

The previous prime is 164631871. The next prime is 164631913. The reversal of 164631899 is 998136461.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 164631899 - 2¹² = 164627803 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (164631839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82315949 + 82315950.

It is an arithmetic number, because the mean of its divisors is an integer number (82315950).

Almost surely, 2^164631899 is an apocalyptic number.

164631899 is a deficient number, since it is larger than the sum of its proper divisors (1).

164631899 is an equidigital number, since it uses as much as digits as its factorization.

164631899 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 279936, while the sum is 47.

The square root of 164631899 is about 12830.8962664344. The cubic root of 164631899 is about 548.0724802900.

The spelling of 164631899 in words is "one hundred sixty-four million, six hundred thirty-one thousand, eight hundred ninety-nine".