164631939 has 16 divisors (see below), whose sum is σ = 224100000. Its totient is φ = 107467776.

The previous prime is 164631937. The next prime is 164631947. The reversal of 164631939 is 939136461.

It is not a de Polignac number, because 164631939 - 2¹ = 164631937 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 164631939.

It is not an unprimeable number, because it can be changed into a prime (164631937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 131187 + ... + 132435.

It is an arithmetic number, because the mean of its divisors is an integer number (14006250).

Almost surely, 2^164631939 is an apocalyptic number.

164631939 is a deficient number, since it is larger than the sum of its proper divisors (59468061).

164631939 is a wasteful number, since it uses less digits than its factorization.

164631939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2134.

The product of its digits is 104976, while the sum is 42.

The square root of 164631939 is about 12830.8978251719. The cubic root of 164631939 is about 548.0725246777.

The spelling of 164631939 in words is "one hundred sixty-four million, six hundred thirty-one thousand, nine hundred thirty-nine".