63970869979 has 4 divisors (see below), whose sum is σ = 66752212176. Its totient is φ = 61189527784.

The previous prime is 63970869931. The next prime is 63970870003. The reversal of 63970869979 is 97996807936.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63970869979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63970869379) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1390671064 + ... + 1390671109.

It is an arithmetic number, because the mean of its divisors is an integer number (16688053044).

Almost surely, 2^63970869979 is an apocalyptic number.

63970869979 is a deficient number, since it is larger than the sum of its proper divisors (2781342197).

63970869979 is a wasteful number, since it uses less digits than its factorization.

63970869979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2781342196.

The product of its (nonzero) digits is 277766496, while the sum is 73.

The spelling of 63970869979 in words is "sixty-three billion, nine hundred seventy million, eight hundred sixty-nine thousand, nine hundred seventy-nine".