72492113 has 4 divisors (see below), whose sum is σ = 75643968. Its totient is φ = 69340260.

The previous prime is 72492107. The next prime is 72492127. The reversal of 72492113 is 31129427.

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, and also an emirpimes, since its reverse is a distinct semiprime: 31129427 = 7 ⋅4447061.

It is a cyclic number.

It is not a de Polignac number, because 72492113 - 2¹⁴ = 72475729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72492143) 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, 1575893 + ... + 1575938.

It is an arithmetic number, because the mean of its divisors is an integer number (18910992).

Almost surely, 2^72492113 is an apocalyptic number.

It is an amenable number.

72492113 is a deficient number, since it is larger than the sum of its proper divisors (3151855).

72492113 is a wasteful number, since it uses less digits than its factorization.

72492113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3151854.

The product of its digits is 3024, while the sum is 29.

The square root of 72492113 is about 8514.2300297796. The cubic root of 72492113 is about 416.9624247533.

The spelling of 72492113 in words is "seventy-two million, four hundred ninety-two thousand, one hundred thirteen".