72670091 has 8 divisors (see below), whose sum is σ = 78568224. Its totient is φ = 66816000.

The previous prime is 72670067. The next prime is 72670099. The reversal of 72670091 is 19007627.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72670091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72670099) 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, 7535 + ... + 14216.

It is an arithmetic number, because the mean of its divisors is an integer number (9821028).

Almost surely, 2^72670091 is an apocalyptic number.

72670091 is a deficient number, since it is larger than the sum of its proper divisors (5898133).

72670091 is a wasteful number, since it uses less digits than its factorization.

72670091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22021.

The product of its (nonzero) digits is 5292, while the sum is 32.

The square root of 72670091 is about 8524.6754190409. The cubic root of 72670091 is about 417.3033790358.

The spelling of 72670091 in words is "seventy-two million, six hundred seventy thousand, ninety-one".