63899934907 has 2 divisors, whose sum is σ = 63899934908. Its totient is φ = 63899934906.

The previous prime is 63899934881. The next prime is 63899934929. The reversal of 63899934907 is 70943999836.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63899934907 is a prime.

It is a super-2 number, since 2×63899934907² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (63899935907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31949967453 + 31949967454.

It is an arithmetic number, because the mean of its divisors is an integer number (31949967454).

Almost surely, 2^63899934907 is an apocalyptic number.

63899934907 is a deficient number, since it is larger than the sum of its proper divisors (1).

63899934907 is an equidigital number, since it uses as much as digits as its factorization.

63899934907 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 79361856, while the sum is 67.

The spelling of 63899934907 in words is "sixty-three billion, eight hundred ninety-nine million, nine hundred thirty-four thousand, nine hundred seven".