63923731 has 2 divisors, whose sum is σ = 63923732. Its totient is φ = 63923730.

The previous prime is 63923729. The next prime is 63923773. The reversal of 63923731 is 13732936.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 63923731 - 2¹ = 63923729 is a prime.

It is a super-2 number, since 2×63923731² = 8172486769920722, which contains 22 as substring.

Together with 63923729, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (63921731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31961865 + 31961866.

It is an arithmetic number, because the mean of its divisors is an integer number (31961866).

Almost surely, 2^63923731 is an apocalyptic number.

63923731 is a deficient number, since it is larger than the sum of its proper divisors (1).

63923731 is an equidigital number, since it uses as much as digits as its factorization.

63923731 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20412, while the sum is 34.

The square root of 63923731 is about 7995.2317664968. The cubic root of 63923731 is about 399.8410430901.

The spelling of 63923731 in words is "sixty-three million, nine hundred twenty-three thousand, seven hundred thirty-one".