625865971 has 2 divisors, whose sum is σ = 625865972. Its totient is φ = 625865970.

The previous prime is 625865941. The next prime is 625865983. The reversal of 625865971 is 179568526.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 625865971 - 2⁵ = 625865939 is a prime.

It is not a weakly prime, because it can be changed into another prime (625865921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 312932985 + 312932986.

It is an arithmetic number, because the mean of its divisors is an integer number (312932986).

Almost surely, 2^625865971 is an apocalyptic number.

625865971 is a deficient number, since it is larger than the sum of its proper divisors (1).

625865971 is an equidigital number, since it uses as much as digits as its factorization.

625865971 is an evil number, because the sum of its binary digits is even.

The product of its digits is 907200, while the sum is 49.

The square root of 625865971 is about 25017.3134249064. The cubic root of 625865971 is about 855.3826683256.

The spelling of 625865971 in words is "six hundred twenty-five million, eight hundred sixty-five thousand, nine hundred seventy-one".