63455939 has 2 divisors, whose sum is σ = 63455940. Its totient is φ = 63455938.

The previous prime is 63455869. The next prime is 63455957. The reversal of 63455939 is 93955436.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63455939 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 63455939.

It is not a weakly prime, because it can be changed into another prime (63455039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31727969 + 31727970.

It is an arithmetic number, because the mean of its divisors is an integer number (31727970).

Almost surely, 2^63455939 is an apocalyptic number.

63455939 is a deficient number, since it is larger than the sum of its proper divisors (1).

63455939 is an equidigital number, since it uses as much as digits as its factorization.

63455939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 437400, while the sum is 44.

The square root of 63455939 is about 7965.9236124884. The cubic root of 63455939 is about 398.8633124969.

The spelling of 63455939 in words is "sixty-three million, four hundred fifty-five thousand, nine hundred thirty-nine".