625172771 has 2 divisors, whose sum is σ = 625172772. Its totient is φ = 625172770.

The previous prime is 625172759. The next prime is 625172777. The reversal of 625172771 is 177271526.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 625172771 - 2⁶ = 625172707 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (625172777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 312586385 + 312586386.

It is an arithmetic number, because the mean of its divisors is an integer number (312586386).

Almost surely, 2^625172771 is an apocalyptic number.

625172771 is a deficient number, since it is larger than the sum of its proper divisors (1).

625172771 is an equidigital number, since it uses as much as digits as its factorization.

625172771 is an evil number, because the sum of its binary digits is even.

The product of its digits is 41160, while the sum is 38.

The square root of 625172771 is about 25003.4551812345. The cubic root of 625172771 is about 855.0667485479.

The spelling of 625172771 in words is "six hundred twenty-five million, one hundred seventy-two thousand, seven hundred seventy-one".