72117453 has 8 divisors (see below), whose sum is σ = 96220000. Its totient is φ = 48046608.

The previous prime is 72117431. The next prime is 72117467. The reversal of 72117453 is 35471127.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 72117453 - 2⁵ = 72117421 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 72117453.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72117413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1978 + ... + 12171.

It is an arithmetic number, because the mean of its divisors is an integer number (12027500).

Almost surely, 2^72117453 is an apocalyptic number.

It is an amenable number.

72117453 is a deficient number, since it is larger than the sum of its proper divisors (24102547).

72117453 is a wasteful number, since it uses less digits than its factorization.

72117453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15851.

The product of its digits is 5880, while the sum is 30.

The square root of 72117453 is about 8492.1995383999. The cubic root of 72117453 is about 416.2428566080.

The spelling of 72117453 in words is "seventy-two million, one hundred seventeen thousand, four hundred fifty-three".