68807025 has 81 divisors (see below), whose sum is σ = 145199691. Its totient is φ = 31056480.

The previous prime is 68806993. The next prime is 68807029. The reversal of 68807025 is 52070886.

The square root of 68807025 is 8295.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 24770529 + 44036496 = 4977^2 + 6636^2 .

It is not a de Polignac number, because 68807025 - 2⁵ = 68806993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (68807029) 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 in 80 ways as a sum of consecutive naturals, for example, 870936 + ... + 871014.

Almost surely, 2^68807025 is an apocalyptic number.

68807025 is the 8295-th square number.

68807025 is the 4148-th centered octagonal number.

It is an amenable number.

68807025 is an abundant number, since it is smaller than the sum of its proper divisors (76392666).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

68807025 is a wasteful number, since it uses less digits than its factorization.

68807025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188 (or 94 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The cubic root of 68807025 is about 409.7738689574.

Multiplying 68807025 by its sum of digits (36), we get a square (2477052900 = 49770²).

The spelling of 68807025 in words is "sixty-eight million, eight hundred seven thousand, twenty-five".