395625631 has 2 divisors, whose sum is σ = 395625632. Its totient is φ = 395625630.

The previous prime is 395625589. The next prime is 395625647. The reversal of 395625631 is 136526593.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 395625631 - 2¹¹ = 395623583 is a prime.

It is a super-2 number, since 2×395625631² = 313039279808296322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (395625661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197812815 + 197812816.

It is an arithmetic number, because the mean of its divisors is an integer number (197812816).

Almost surely, 2^395625631 is an apocalyptic number.

395625631 is a deficient number, since it is larger than the sum of its proper divisors (1).

395625631 is an equidigital number, since it uses as much as digits as its factorization.

395625631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145800, while the sum is 40.

The square root of 395625631 is about 19890.3401428935. The cubic root of 395625631 is about 734.1105633972.

The spelling of 395625631 in words is "three hundred ninety-five million, six hundred twenty-five thousand, six hundred thirty-one".