63959879 has 2 divisors, whose sum is σ = 63959880. Its totient is φ = 63959878.

The previous prime is 63959869. The next prime is 63959881. The reversal of 63959879 is 97895936.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 63959879 - 2¹² = 63955783 is a prime.

It is a super-2 number, since 2×63959879² = 8181732243389282, which contains 22 as substring.

Together with 63959881, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63959839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31979939 + 31979940.

It is an arithmetic number, because the mean of its divisors is an integer number (31979940).

Almost surely, 2^63959879 is an apocalyptic number.

63959879 is a deficient number, since it is larger than the sum of its proper divisors (1).

63959879 is an equidigital number, since it uses as much as digits as its factorization.

63959879 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3674160, while the sum is 56.

The square root of 63959879 is about 7997.4920443849. The cubic root of 63959879 is about 399.9163971109.

The spelling of 63959879 in words is "sixty-three million, nine hundred fifty-nine thousand, eight hundred seventy-nine".