6631939 has 2 divisors, whose sum is σ = 6631940. Its totient is φ = 6631938.

The previous prime is 6631913. The next prime is 6631951. The reversal of 6631939 is 9391366.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6631939 - 2⁵ = 6631907 is a prime.

It is a super-2 number, since 2×6631939² = 87965229799442, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6631898 and 6631907.

It is not a weakly prime, because it can be changed into another prime (6631909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3315969 + 3315970.

It is an arithmetic number, because the mean of its divisors is an integer number (3315970).

Almost surely, 2^6631939 is an apocalyptic number.

6631939 is a deficient number, since it is larger than the sum of its proper divisors (1).

6631939 is an equidigital number, since it uses as much as digits as its factorization.

6631939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26244, while the sum is 37.

The square root of 6631939 is about 2575.2551329917. The cubic root of 6631939 is about 187.8798368232.

The spelling of 6631939 in words is "six million, six hundred thirty-one thousand, nine hundred thirty-nine".