52640979 has 4 divisors (see below), whose sum is σ = 70187976. Its totient is φ = 35093984.

The previous prime is 52640977. The next prime is 52640981. The reversal of 52640979 is 97904625.

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

It is an interprime number because it is at equal distance from previous prime (52640977) and next prime (52640981).

It is a cyclic number.

It is not a de Polignac number, because 52640979 - 2¹ = 52640977 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 52640979.

It is not an unprimeable number, because it can be changed into a prime (52640971) 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, 8773494 + ... + 8773499.

It is an arithmetic number, because the mean of its divisors is an integer number (17546994).

Almost surely, 2^52640979 is an apocalyptic number.

52640979 is a deficient number, since it is larger than the sum of its proper divisors (17546997).

52640979 is a wasteful number, since it uses less digits than its factorization.

52640979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17546996.

The product of its (nonzero) digits is 136080, while the sum is 42.

The square root of 52640979 is about 7255.4103260946. The cubic root of 52640979 is about 374.7784860655.

The spelling of 52640979 in words is "fifty-two million, six hundred forty thousand, nine hundred seventy-nine".