72879427 has 4 divisors (see below), whose sum is σ = 74657016. Its totient is φ = 71101840.

The previous prime is 72879413. The next prime is 72879431. The reversal of 72879427 is 72497827.

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 72879427 - 2¹⁵ = 72846659 is a prime.

It is a super-2 number, since 2×72879427² = 10622821759696658, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72879437) 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, 888733 + ... + 888814.

It is an arithmetic number, because the mean of its divisors is an integer number (18664254).

Almost surely, 2^72879427 is an apocalyptic number.

72879427 is a deficient number, since it is larger than the sum of its proper divisors (1777589).

72879427 is a wasteful number, since it uses less digits than its factorization.

72879427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1777588.

The product of its digits is 395136, while the sum is 46.

The square root of 72879427 is about 8536.9448282158. The cubic root of 72879427 is about 417.7036944526.

The spelling of 72879427 in words is "seventy-two million, eight hundred seventy-nine thousand, four hundred twenty-seven".