68388025 has 24 divisors (see below), whose sum is σ = 92237400. Its totient is φ = 50088960.

The previous prime is 68387987. The next prime is 68388029. The reversal of 68388025 is 52088386.

It can be written as a sum of positive squares in 12 ways, for example, as 14409616 + 53978409 = 3796^2 + 7347^2 .

It is not a de Polignac number, because 68388025 - 2⁹ = 68387513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (68388029) 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 23 ways as a sum of consecutive naturals, for example, 13551 + ... + 17899.

It is an arithmetic number, because the mean of its divisors is an integer number (3843225).

Almost surely, 2^68388025 is an apocalyptic number.

It is an amenable number.

68388025 is a deficient number, since it is larger than the sum of its proper divisors (23849375).

68388025 is a wasteful number, since it uses less digits than its factorization.

68388025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4413 (or 4408 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 40.

The square root of 68388025 is about 8269.7052547234. The cubic root of 68388025 is about 408.9404029590.

The spelling of 68388025 in words is "sixty-eight million, three hundred eighty-eight thousand, twenty-five".