63725679 has 18 divisors (see below), whose sum is σ = 92990040. Its totient is φ = 42053256.

The previous prime is 63725653. The next prime is 63725693. The reversal of 63725679 is 97652736.

63725679 is a `hidden beast` number, since 637 + 2 + 5 + 6 + 7 + 9 = 666.

It is not a de Polignac number, because 63725679 - 2¹² = 63721583 is a prime.

It is a super-2 number, since 2×63725679² = 8121924328022082, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63725609) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 144942 + ... + 145380.

Almost surely, 2^63725679 is an apocalyptic number.

63725679 is a deficient number, since it is larger than the sum of its proper divisors (29264361).

63725679 is a wasteful number, since it uses less digits than its factorization.

63725679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 699 (or 569 counting only the distinct ones).

The product of its digits is 476280, while the sum is 45.

The square root of 63725679 is about 7982.8365259474. The cubic root of 63725679 is about 399.4276794301.

The spelling of 63725679 in words is "sixty-three million, seven hundred twenty-five thousand, six hundred seventy-nine".