63979801 has 4 divisors (see below), whose sum is σ = 64022400. Its totient is φ = 63937204.

The previous prime is 63979739. The next prime is 63979837. The reversal of 63979801 is 10897936.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 63979801 - 2⁷ = 63979673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63970801) 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, 18961 + ... + 22078.

It is an arithmetic number, because the mean of its divisors is an integer number (16005600).

Almost surely, 2^63979801 is an apocalyptic number.

It is an amenable number.

63979801 is a deficient number, since it is larger than the sum of its proper divisors (42599).

63979801 is a wasteful number, since it uses less digits than its factorization.

63979801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42598.

The product of its (nonzero) digits is 81648, while the sum is 43.

The square root of 63979801 is about 7998.7374628750. The cubic root of 63979801 is about 399.9579143221.

The spelling of 63979801 in words is "sixty-three million, nine hundred seventy-nine thousand, eight hundred one".