72379331 has 4 divisors (see below), whose sum is σ = 74875200. Its totient is φ = 69883464.

The previous prime is 72379301. The next prime is 72379357. The reversal of 72379331 is 13397327.

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 72379331 - 2⁶ = 72379267 is a prime.

It is a super-2 number, since 2×72379331² = 10477535112015122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72379291 and 72379300.

It is not an unprimeable number, because it can be changed into a prime (72379301) 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, 1247891 + ... + 1247948.

It is an arithmetic number, because the mean of its divisors is an integer number (18718800).

Almost surely, 2^72379331 is an apocalyptic number.

72379331 is a deficient number, since it is larger than the sum of its proper divisors (2495869).

72379331 is a wasteful number, since it uses less digits than its factorization.

72379331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2495868.

The product of its digits is 23814, while the sum is 35.

The square root of 72379331 is about 8507.6043043856. The cubic root of 72379331 is about 416.7460781620.

The spelling of 72379331 in words is "seventy-two million, three hundred seventy-nine thousand, three hundred thirty-one".