63979511 has 4 divisors (see below), whose sum is σ = 63996024. Its totient is φ = 63963000.

The previous prime is 63979507. The next prime is 63979523. The reversal of 63979511 is 11597936.

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

It is a cyclic number.

It is not a de Polignac number, because 63979511 - 2² = 63979507 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63979711) 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, 1061 + ... + 11361.

It is an arithmetic number, because the mean of its divisors is an integer number (15999006).

Almost surely, 2^63979511 is an apocalyptic number.

63979511 is a deficient number, since it is larger than the sum of its proper divisors (16513).

63979511 is a wasteful number, since it uses less digits than its factorization.

63979511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16512.

The product of its digits is 51030, while the sum is 41.

The square root of 63979511 is about 7998.7193349936. The cubic root of 63979511 is about 399.9573100274.

The spelling of 63979511 in words is "sixty-three million, nine hundred seventy-nine thousand, five hundred eleven".