63997479 has 72 divisors (see below), whose sum is σ = 120753360. Its totient is φ = 33203520.

The previous prime is 63997441. The next prime is 63997481. The reversal of 63997479 is 97479936.

It is not a de Polignac number, because 63997479 - 2¹³ = 63989287 is a prime.

Its product of digits (2571912) is a multiple of the sum of its prime divisors (84).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63997489) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1049109 + ... + 1049169.

It is an arithmetic number, because the mean of its divisors is an integer number (1677130).

Almost surely, 2^63997479 is an apocalyptic number.

63997479 is a deficient number, since it is larger than the sum of its proper divisors (56755881).

63997479 is a wasteful number, since it uses less digits than its factorization.

63997479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158 (or 84 counting only the distinct ones).

The product of its digits is 2571912, while the sum is 54.

The square root of 63997479 is about 7999.8424359483. The cubic root of 63997479 is about 399.9947478477.

The spelling of 63997479 in words is "sixty-three million, nine hundred ninety-seven thousand, four hundred seventy-nine".