72173715 has 8 divisors (see below), whose sum is σ = 115477968. Its totient is φ = 38492640.

The previous prime is 72173707. The next prime is 72173753. The reversal of 72173715 is 51737127.

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

It is not a de Polignac number, because 72173715 - 2³ = 72173707 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2405776 + ... + 2405805.

It is an arithmetic number, because the mean of its divisors is an integer number (14434746).

Almost surely, 2^72173715 is an apocalyptic number.

72173715 is a deficient number, since it is larger than the sum of its proper divisors (43304253).

72173715 is a wasteful number, since it uses less digits than its factorization.

72173715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4811589.

The product of its digits is 10290, while the sum is 33.

The square root of 72173715 is about 8495.5114619427. The cubic root of 72173715 is about 416.3510715975.

The spelling of 72173715 in words is "seventy-two million, one hundred seventy-three thousand, seven hundred fifteen".