68439925 has 6 divisors (see below), whose sum is σ = 84865538. Its totient is φ = 54751920.

The previous prime is 68439893. The next prime is 68439937. The reversal of 68439925 is 52993486.

It can be written as a sum of positive squares in 3 ways, for example, as 904401 + 67535524 = 951^2 + 8218^2 .

It is not a de Polignac number, because 68439925 - 2⁵ = 68439893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 in 5 ways as a sum of consecutive naturals, for example, 1368774 + ... + 1368823.

Almost surely, 2^68439925 is an apocalyptic number.

It is an amenable number.

68439925 is a deficient number, since it is larger than the sum of its proper divisors (16425613).

68439925 is a wasteful number, since it uses less digits than its factorization.

68439925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2737607 (or 2737602 counting only the distinct ones).

The product of its digits is 466560, while the sum is 46.

The square root of 68439925 is about 8272.8426190760. The cubic root of 68439925 is about 409.0438257447.

The spelling of 68439925 in words is "sixty-eight million, four hundred thirty-nine thousand, nine hundred twenty-five".