6390403631 has 2 divisors, whose sum is σ = 6390403632. Its totient is φ = 6390403630.

The previous prime is 6390403597. The next prime is 6390403633. The reversal of 6390403631 is 1363040936.

6390403631 is digitally balanced in base 3, 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 6390403631 - 2⁶ = 6390403567 is a prime.

It is a super-2 number, since 2×6390403631² = 81674517134195968322, which contains 22 as substring.

Together with 6390403633, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 6390403591 and 6390403600.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6390403633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3195201815 + 3195201816.

It is an arithmetic number, because the mean of its divisors is an integer number (3195201816).

Almost surely, 2^6390403631 is an apocalyptic number.

6390403631 is a deficient number, since it is larger than the sum of its proper divisors (1).

6390403631 is an equidigital number, since it uses as much as digits as its factorization.

6390403631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34992, while the sum is 35.

The square root of 6390403631 is about 79940.0001938954. Note that the first 3 decimals coincide. The cubic root of 6390403631 is about 1855.7071026007.

The spelling of 6390403631 in words is "six billion, three hundred ninety million, four hundred three thousand, six hundred thirty-one".