63919963 has 2 divisors, whose sum is σ = 63919964. Its totient is φ = 63919962.

The previous prime is 63919937. The next prime is 63919991. The reversal of 63919963 is 36991936.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 63919963 - 2⁵ = 63919931 is a prime.

It is not a weakly prime, because it can be changed into another prime (63919903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31959981 + 31959982.

It is an arithmetic number, because the mean of its divisors is an integer number (31959982).

Almost surely, 2^63919963 is an apocalyptic number.

63919963 is a deficient number, since it is larger than the sum of its proper divisors (1).

63919963 is an equidigital number, since it uses as much as digits as its factorization.

63919963 is an evil number, because the sum of its binary digits is even.

The product of its digits is 236196, while the sum is 46.

The square root of 63919963 is about 7994.9961225757. The cubic root of 63919963 is about 399.8331866930.

It can be divided in two parts, 639 and 19963, that added together give a palindrome (20602).

The spelling of 63919963 in words is "sixty-three million, nine hundred nineteen thousand, nine hundred sixty-three".