72645973 has 8 divisors (see below), whose sum is σ = 76003200. Its totient is φ = 69364320.

The previous prime is 72645971. The next prime is 72645977. The reversal of 72645973 is 37954627.

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

It is a cyclic number.

It is not a de Polignac number, because 72645973 - 2¹ = 72645971 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72645971) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16923 + ... + 20776.

It is an arithmetic number, because the mean of its divisors is an integer number (9500400).

Almost surely, 2^72645973 is an apocalyptic number.

It is an amenable number.

72645973 is a deficient number, since it is larger than the sum of its proper divisors (3357227).

72645973 is a wasteful number, since it uses less digits than its factorization.

72645973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37787.

The product of its digits is 317520, while the sum is 43.

The square root of 72645973 is about 8523.2607023369. The cubic root of 72645973 is about 417.2572085670.

The spelling of 72645973 in words is "seventy-two million, six hundred forty-five thousand, nine hundred seventy-three".