625394949 has 4 divisors (see below), whose sum is σ = 833859936. Its totient is φ = 416929964.

The previous prime is 625394941. The next prime is 625394953. The reversal of 625394949 is 949493526.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 625394949 - 2³ = 625394941 is a prime.

It is a super-2 number, since 2×625394949² = 782237684469425202, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (625394941) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104232489 + ... + 104232494.

It is an arithmetic number, because the mean of its divisors is an integer number (208464984).

Almost surely, 2^625394949 is an apocalyptic number.

It is an amenable number.

625394949 is a deficient number, since it is larger than the sum of its proper divisors (208464987).

625394949 is a wasteful number, since it uses less digits than its factorization.

625394949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208464986.

The product of its digits is 2099520, while the sum is 51.

The square root of 625394949 is about 25007.8977325164. The cubic root of 625394949 is about 855.1680296274.

The spelling of 625394949 in words is "six hundred twenty-five million, three hundred ninety-four thousand, nine hundred forty-nine".