53638979 has 4 divisors (see below), whose sum is σ = 54170160. Its totient is φ = 53107800.

The previous prime is 53638973. The next prime is 53638987. The reversal of 53638979 is 97983635.

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 53638979 - 2¹² = 53634883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53638973) 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, 265439 + ... + 265640.

It is an arithmetic number, because the mean of its divisors is an integer number (13542540).

Almost surely, 2^53638979 is an apocalyptic number.

53638979 is a deficient number, since it is larger than the sum of its proper divisors (531181).

53638979 is a wasteful number, since it uses less digits than its factorization.

53638979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 531180.

The product of its digits is 1224720, while the sum is 50.

The square root of 53638979 is about 7323.8636661260. The cubic root of 53638979 is about 377.1321012622.

The spelling of 53638979 in words is "fifty-three million, six hundred thirty-eight thousand, nine hundred seventy-nine".