625677971 has 2 divisors, whose sum is σ = 625677972. Its totient is φ = 625677970.

The previous prime is 625677967. The next prime is 625677977. The reversal of 625677971 is 179776526.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 625677971 - 2² = 625677967 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (625677977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 312838985 + 312838986.

It is an arithmetic number, because the mean of its divisors is an integer number (312838986).

Almost surely, 2^625677971 is an apocalyptic number.

625677971 is a deficient number, since it is larger than the sum of its proper divisors (1).

625677971 is an equidigital number, since it uses as much as digits as its factorization.

625677971 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1111320, while the sum is 50.

The square root of 625677971 is about 25013.5557448356. Note that the first 3 decimals coincide. The cubic root of 625677971 is about 855.2970120490.

The spelling of 625677971 in words is "six hundred twenty-five million, six hundred seventy-seven thousand, nine hundred seventy-one".