63913963 has 2 divisors, whose sum is σ = 63913964. Its totient is φ = 63913962.

The previous prime is 63913951. The next prime is 63913973. The reversal of 63913963 is 36931936.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 63913963 - 2²⁵ = 30359531 is a prime.

It is not a weakly prime, because it can be changed into another prime (63913973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31956981 + 31956982.

It is an arithmetic number, because the mean of its divisors is an integer number (31956982).

Almost surely, 2^63913963 is an apocalyptic number.

63913963 is a deficient number, since it is larger than the sum of its proper divisors (1).

63913963 is an equidigital number, since it uses as much as digits as its factorization.

63913963 is an evil number, because the sum of its binary digits is even.

The product of its digits is 78732, while the sum is 40.

The square root of 63913963 is about 7994.6208790661. The cubic root of 63913963 is about 399.8206758692.

The spelling of 63913963 in words is "sixty-three million, nine hundred thirteen thousand, nine hundred sixty-three".