625344961 has 4 divisors (see below), whose sum is σ = 633260800. Its totient is φ = 617429124.

The previous prime is 625344959. The next prime is 625344971. The reversal of 625344961 is 169443526.

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 625344961 - 2¹ = 625344959 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (625344911) 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, 3957801 + ... + 3957958.

It is an arithmetic number, because the mean of its divisors is an integer number (158315200).

Almost surely, 2^625344961 is an apocalyptic number.

It is an amenable number.

625344961 is a deficient number, since it is larger than the sum of its proper divisors (7915839).

625344961 is an equidigital number, since it uses as much as digits as its factorization.

625344961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7915838.

The product of its digits is 155520, while the sum is 40.

The square root of 625344961 is about 25006.8982682779. The cubic root of 625344961 is about 855.1452444106.

The spelling of 625344961 in words is "six hundred twenty-five million, three hundred forty-four thousand, nine hundred sixty-one".