72412013 has 4 divisors (see below), whose sum is σ = 72679488. Its totient is φ = 72144540.

The previous prime is 72412003. The next prime is 72412031. The reversal of 72412013 is 31021427.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 72412013 - 2²⁴ = 55634797 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72412003) 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, 133331 + ... + 133872.

It is an arithmetic number, because the mean of its divisors is an integer number (18169872).

Almost surely, 2^72412013 is an apocalyptic number.

It is an amenable number.

72412013 is a deficient number, since it is larger than the sum of its proper divisors (267475).

72412013 is a wasteful number, since it uses less digits than its factorization.

72412013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267474.

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 72412013 is about 8509.5248398486. The cubic root of 72412013 is about 416.8087942517.

The spelling of 72412013 in words is "seventy-two million, four hundred twelve thousand, thirteen".