72999971 has 8 divisors (see below), whose sum is σ = 79707888. Its totient is φ = 66304000.

The previous prime is 72999961. The next prime is 72999973. The reversal of 72999971 is 17999927.

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 72999971 - 2¹⁴ = 72983587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72999973) 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, 14051 + ... + 18531.

It is an arithmetic number, because the mean of its divisors is an integer number (9963486).

Almost surely, 2^72999971 is an apocalyptic number.

72999971 is a deficient number, since it is larger than the sum of its proper divisors (6707917).

72999971 is a wasteful number, since it uses less digits than its factorization.

72999971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5973.

The product of its digits is 642978, while the sum is 53.

The square root of 72999971 is about 8544.0020482207. The cubic root of 72999971 is about 417.9338642953.

The spelling of 72999971 in words is "seventy-two million, nine hundred ninety-nine thousand, nine hundred seventy-one".