625252991 has 8 divisors (see below), whose sum is σ = 682579200. Its totient is φ = 568007640.

The previous prime is 625252961. The next prime is 625253003. The reversal of 625252991 is 199252526.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 625252991 - 2²⁶ = 558144127 is a prime.

It is a super-3 number, since 3×625252991³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (625252921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3431 + ... + 35528.

It is an arithmetic number, because the mean of its divisors is an integer number (85322400).

Almost surely, 2^625252991 is an apocalyptic number.

625252991 is a deficient number, since it is larger than the sum of its proper divisors (57326209).

625252991 is a wasteful number, since it uses less digits than its factorization.

625252991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40429.

The product of its digits is 97200, while the sum is 41.

The square root of 625252991 is about 25005.0593080680. The cubic root of 625252991 is about 855.1033200494.

The spelling of 625252991 in words is "six hundred twenty-five million, two hundred fifty-two thousand, nine hundred ninety-one".