72390679 has 4 divisors (see below), whose sum is σ = 72408960. Its totient is φ = 72372400.

The previous prime is 72390667. The next prime is 72390697. The reversal of 72390679 is 97609327.

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 72390679 - 2¹⁵ = 72357911 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72390649) 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, 439 + ... + 12040.

It is an arithmetic number, because the mean of its divisors is an integer number (18102240).

Almost surely, 2^72390679 is an apocalyptic number.

72390679 is a deficient number, since it is larger than the sum of its proper divisors (18281).

72390679 is a wasteful number, since it uses less digits than its factorization.

72390679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18280.

The product of its (nonzero) digits is 142884, while the sum is 43.

The square root of 72390679 is about 8508.2712110040. The cubic root of 72390679 is about 416.7678568811.

The spelling of 72390679 in words is "seventy-two million, three hundred ninety thousand, six hundred seventy-nine".