625831 has 2 divisors, whose sum is σ = 625832. Its totient is φ = 625830.

The previous prime is 625819. The next prime is 625837. The reversal of 625831 is 138526.

It is a happy number.

625831 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 625831 - 2⁹ = 625319 is a prime.

It is a super-2 number, since 2×625831² = 783328881122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 625796 and 625805.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (625837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 312915 + 312916.

It is an arithmetic number, because the mean of its divisors is an integer number (312916).

2⁶²⁵⁸³¹ is an apocalyptic number.

625831 is a deficient number, since it is larger than the sum of its proper divisors (1).

625831 is an equidigital number, since it uses as much as digits as its factorization.

625831 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1440, while the sum is 25.

The square root of 625831 is about 791.0948110056. The cubic root of 625831 is about 85.5366736190.

The spelling of 625831 in words is "six hundred twenty-five thousand, eight hundred thirty-one".