624316391 has 2 divisors, whose sum is σ = 624316392. Its totient is φ = 624316390.

The previous prime is 624316333. The next prime is 624316417. The reversal of 624316391 is 193613426.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 624316391 - 2⁶ = 624316327 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (624316291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 312158195 + 312158196.

It is an arithmetic number, because the mean of its divisors is an integer number (312158196).

Almost surely, 2^624316391 is an apocalyptic number.

624316391 is a deficient number, since it is larger than the sum of its proper divisors (1).

624316391 is an equidigital number, since it uses as much as digits as its factorization.

624316391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23328, while the sum is 35.

The square root of 624316391 is about 24986.3240793839. The cubic root of 624316391 is about 854.6761382991.

The spelling of 624316391 in words is "six hundred twenty-four million, three hundred sixteen thousand, three hundred ninety-one".