72479431 has 8 divisors (see below), whose sum is σ = 74368224. Its totient is φ = 70596480.

The previous prime is 72479389. The next prime is 72479447. The reversal of 72479431 is 13497427.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 72479431 - 2¹⁵ = 72446663 is a prime.

It is a super-2 number, since 2×72479431² = 10506535836167522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72479131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35371 + ... + 37363.

It is an arithmetic number, because the mean of its divisors is an integer number (9296028).

Almost surely, 2^72479431 is an apocalyptic number.

72479431 is a deficient number, since it is larger than the sum of its proper divisors (1888793).

72479431 is a wasteful number, since it uses less digits than its factorization.

72479431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2921.

The product of its digits is 42336, while the sum is 37.

The square root of 72479431 is about 8513.4852440114. The cubic root of 72479431 is about 416.9381084259.

The spelling of 72479431 in words is "seventy-two million, four hundred seventy-nine thousand, four hundred thirty-one".