63929939 has 2 divisors, whose sum is σ = 63929940. Its totient is φ = 63929938.

The previous prime is 63929923. The next prime is 63929941. The reversal of 63929939 is 93992936.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 63929939 - 2⁴ = 63929923 is a prime.

Together with 63929941, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (63929909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31964969 + 31964970.

It is an arithmetic number, because the mean of its divisors is an integer number (31964970).

Almost surely, 2^63929939 is an apocalyptic number.

63929939 is a deficient number, since it is larger than the sum of its proper divisors (1).

63929939 is an equidigital number, since it uses as much as digits as its factorization.

63929939 is an evil number, because the sum of its binary digits is even.

The product of its digits is 708588, while the sum is 50.

The square root of 63929939 is about 7995.6199884687. The cubic root of 63929939 is about 399.8539862898.

The spelling of 63929939 in words is "sixty-three million, nine hundred twenty-nine thousand, nine hundred thirty-nine".