72684453 has 4 divisors (see below), whose sum is σ = 96912608. Its totient is φ = 48456300.

The previous prime is 72684427. The next prime is 72684463. The reversal of 72684453 is 35448627.

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.

It is not a de Polignac number, because 72684453 - 2²⁰ = 71635877 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 (72684413) 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, 12114073 + ... + 12114078.

It is an arithmetic number, because the mean of its divisors is an integer number (24228152).

Almost surely, 2^72684453 is an apocalyptic number.

It is an amenable number.

72684453 is a deficient number, since it is larger than the sum of its proper divisors (24228155).

72684453 is a wasteful number, since it uses less digits than its factorization.

72684453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24228154.

The product of its digits is 161280, while the sum is 39.

The square root of 72684453 is about 8525.5177555384. The cubic root of 72684453 is about 417.3308681824.

It can be divided in two parts, 72684 and 453, that added together give a palindrome (73137).

The spelling of 72684453 in words is "seventy-two million, six hundred eighty-four thousand, four hundred fifty-three".