63979477 has 4 divisors (see below), whose sum is σ = 64154176. Its totient is φ = 63804780.

The previous prime is 63979469. The next prime is 63979499. The reversal of 63979477 is 77497936.

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 63979477 - 2³ = 63979469 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 (63970477) 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, 86799 + ... + 87532.

It is an arithmetic number, because the mean of its divisors is an integer number (16038544).

Almost surely, 2^63979477 is an apocalyptic number.

It is an amenable number.

63979477 is a deficient number, since it is larger than the sum of its proper divisors (174699).

63979477 is a wasteful number, since it uses less digits than its factorization.

63979477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174698.

The product of its digits is 2000376, while the sum is 52.

The square root of 63979477 is about 7998.7172096531. The cubic root of 63979477 is about 399.9572391789.

The spelling of 63979477 in words is "sixty-three million, nine hundred seventy-nine thousand, four hundred seventy-seven".