625004091 has 6 divisors (see below), whose sum is σ = 902783700. Its totient is φ = 416669388.

The previous prime is 625004089. The next prime is 625004119. The reversal of 625004091 is 190400526.

625004091 is a `hidden beast` number, since 6 + 250 + 0 + 409 + 1 = 666.

It is not a de Polignac number, because 625004091 - 2¹ = 625004089 is a prime.

It is a super-2 number, since 2×625004091² = 781260227533472562, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (625004021) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 34722441 + ... + 34722458.

It is an arithmetic number, because the mean of its divisors is an integer number (150463950).

Almost surely, 2^625004091 is an apocalyptic number.

625004091 is a deficient number, since it is larger than the sum of its proper divisors (277779609).

625004091 is a wasteful number, since it uses less digits than its factorization.

625004091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69444905 (or 69444902 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 625004091 is about 25000.0818198661. The cubic root of 625004091 is about 854.9898388040.

The spelling of 625004091 in words is "six hundred twenty-five million, four thousand, ninety-one".