72213079 has 4 divisors (see below), whose sum is σ = 72235800. Its totient is φ = 72190360.

The previous prime is 72213067. The next prime is 72213107. The reversal of 72213079 is 97031227.

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 72213079 - 2⁵ = 72213047 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 72213079.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72213019) 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, 5629 + ... + 13270.

It is an arithmetic number, because the mean of its divisors is an integer number (18058950).

Almost surely, 2^72213079 is an apocalyptic number.

72213079 is a deficient number, since it is larger than the sum of its proper divisors (22721).

72213079 is a wasteful number, since it uses less digits than its factorization.

72213079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22720.

The product of its (nonzero) digits is 5292, while the sum is 31.

The square root of 72213079 is about 8497.8278989398. The cubic root of 72213079 is about 416.4267513418.

The spelling of 72213079 in words is "seventy-two million, two hundred thirteen thousand, seventy-nine".