625959961 has 4 divisors (see below), whose sum is σ = 682865424. Its totient is φ = 569054500.

The previous prime is 625959953. The next prime is 625960001. The reversal of 625959961 is 169959526.

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 625959961 - 2³ = 625959953 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 625959899 and 625959908.

It is not an unprimeable number, because it can be changed into a prime (625959911) 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, 28452715 + ... + 28452736.

It is an arithmetic number, because the mean of its divisors is an integer number (170716356).

Almost surely, 2^625959961 is an apocalyptic number.

It is an amenable number.

625959961 is a deficient number, since it is larger than the sum of its proper divisors (56905463).

625959961 is a wasteful number, since it uses less digits than its factorization.

625959961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56905462.

The product of its digits is 1312200, while the sum is 52.

The square root of 625959961 is about 25019.1918534552. The cubic root of 625959961 is about 855.4254854762.

The spelling of 625959961 in words is "six hundred twenty-five million, nine hundred fifty-nine thousand, nine hundred sixty-one".