63904943 has 2 divisors, whose sum is σ = 63904944. Its totient is φ = 63904942.

The previous prime is 63904933. The next prime is 63904949. The reversal of 63904943 is 34940936.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 63904943 - 2⁴ = 63904927 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 63904897 and 63904906.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63904949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31952471 + 31952472.

It is an arithmetic number, because the mean of its divisors is an integer number (31952472).

Almost surely, 2^63904943 is an apocalyptic number.

63904943 is a deficient number, since it is larger than the sum of its proper divisors (1).

63904943 is an equidigital number, since it uses as much as digits as its factorization.

63904943 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 69984, while the sum is 38.

The square root of 63904943 is about 7994.0567298462. The cubic root of 63904943 is about 399.8018664573.

The spelling of 63904943 in words is "sixty-three million, nine hundred four thousand, nine hundred forty-three".