72552979 has 4 divisors (see below), whose sum is σ = 72649080. Its totient is φ = 72456880.

The previous prime is 72552947. The next prime is 72553037. The reversal of 72552979 is 97925527.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97925527 = 7 ⋅13989361.

It is a cyclic number.

It is not a de Polignac number, because 72552979 - 2⁵ = 72552947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72555979) 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, 46909 + ... + 48430.

It is an arithmetic number, because the mean of its divisors is an integer number (18162270).

Almost surely, 2^72552979 is an apocalyptic number.

72552979 is a deficient number, since it is larger than the sum of its proper divisors (96101).

72552979 is an equidigital number, since it uses as much as digits as its factorization.

72552979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96100.

The product of its digits is 396900, while the sum is 46.

The square root of 72552979 is about 8517.8036488287. The cubic root of 72552979 is about 417.0790891017.

The spelling of 72552979 in words is "seventy-two million, five hundred fifty-two thousand, nine hundred seventy-nine".