72112649 has 4 divisors (see below), whose sum is σ = 82414464. Its totient is φ = 61810836.

The previous prime is 72112639. The next prime is 72112661. The reversal of 72112649 is 94621127.

It is a happy number.

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: 94621127 = 293 ⋅322939.

It is a cyclic number.

It is not a de Polignac number, because 72112649 - 2⁴ = 72112633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72112639) 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, 5150897 + ... + 5150910.

It is an arithmetic number, because the mean of its divisors is an integer number (20603616).

Almost surely, 2^72112649 is an apocalyptic number.

It is an amenable number.

72112649 is a deficient number, since it is larger than the sum of its proper divisors (10301815).

72112649 is a wasteful number, since it uses less digits than its factorization.

72112649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10301814.

The product of its digits is 6048, while the sum is 32.

The square root of 72112649 is about 8491.9166858843. The cubic root of 72112649 is about 416.2336139305.

The spelling of 72112649 in words is "seventy-two million, one hundred twelve thousand, six hundred forty-nine".