72673915 has 4 divisors (see below), whose sum is σ = 87208704. Its totient is φ = 58139128.

The previous prime is 72673903. The next prime is 72673921. The reversal of 72673915 is 51937627.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 72673915 - 2¹¹ = 72671867 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7267387 + ... + 7267396.

It is an arithmetic number, because the mean of its divisors is an integer number (21802176).

Almost surely, 2^72673915 is an apocalyptic number.

72673915 is a deficient number, since it is larger than the sum of its proper divisors (14534789).

72673915 is a wasteful number, since it uses less digits than its factorization.

72673915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14534788.

The product of its digits is 79380, while the sum is 40.

The square root of 72673915 is about 8524.8997061549. The cubic root of 72673915 is about 417.3106985998.

The spelling of 72673915 in words is "seventy-two million, six hundred seventy-three thousand, nine hundred fifteen".