164687725 has 12 divisors (see below), whose sum is σ = 214961440. Its totient is φ = 124815600.

The previous prime is 164687713. The next prime is 164687729. The reversal of 164687725 is 527786461.

It is a happy number.

It is not a de Polignac number, because 164687725 - 2⁷ = 164687597 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164687729) 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 in 11 ways as a sum of consecutive naturals, for example, 172881 + ... + 173830.

Almost surely, 2^164687725 is an apocalyptic number.

It is an amenable number.

164687725 is a deficient number, since it is larger than the sum of its proper divisors (50273715).

164687725 is a wasteful number, since it uses less digits than its factorization.

164687725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346740 (or 346735 counting only the distinct ones).

The product of its digits is 564480, while the sum is 46.

The square root of 164687725 is about 12833.0715341262. The cubic root of 164687725 is about 548.1344229972.

The spelling of 164687725 in words is "one hundred sixty-four million, six hundred eighty-seven thousand, seven hundred twenty-five".