72879379 has 4 divisors (see below), whose sum is σ = 72916200. Its totient is φ = 72842560.

The previous prime is 72879353. The next prime is 72879397. The reversal of 72879379 is 97397827.

It is a happy number.

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 72879379 - 2⁵ = 72879347 is a prime.

It is a super-2 number, since 2×72879379² = 10622807766851282, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72879329) 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, 15262 + ... + 19459.

It is an arithmetic number, because the mean of its divisors is an integer number (18229050).

Almost surely, 2^72879379 is an apocalyptic number.

72879379 is a deficient number, since it is larger than the sum of its proper divisors (36821).

72879379 is a wasteful number, since it uses less digits than its factorization.

72879379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36820.

The product of its digits is 1333584, while the sum is 52.

The square root of 72879379 is about 8536.9420169051. The cubic root of 72879379 is about 417.7036027496.

The spelling of 72879379 in words is "seventy-two million, eight hundred seventy-nine thousand, three hundred seventy-nine".