72135793 has 4 divisors (see below), whose sum is σ = 72168448. Its totient is φ = 72103140.

The previous prime is 72135781. The next prime is 72135827. The reversal of 72135793 is 39753127.

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: 39753127 = 53 ⋅750059.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72135793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72135493) 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, 12753 + ... + 17518.

It is an arithmetic number, because the mean of its divisors is an integer number (18042112).

Almost surely, 2^72135793 is an apocalyptic number.

It is an amenable number.

72135793 is a deficient number, since it is larger than the sum of its proper divisors (32655).

72135793 is a wasteful number, since it uses less digits than its factorization.

72135793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32654.

The product of its digits is 39690, while the sum is 37.

The square root of 72135793 is about 8493.2792842341. The cubic root of 72135793 is about 416.2781381598.

The spelling of 72135793 in words is "seventy-two million, one hundred thirty-five thousand, seven hundred ninety-three".