72197587 has 32 divisors (see below), whose sum is σ = 96422400. Its totient is φ = 52358400.

The previous prime is 72197581. The next prime is 72197599. The reversal of 72197587 is 78579127.

It is a cyclic number.

It is not a de Polignac number, because 72197587 - 2³ = 72197579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72197581) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 88839 + ... + 89647.

It is an arithmetic number, because the mean of its divisors is an integer number (3013200).

Almost surely, 2^72197587 is an apocalyptic number.

72197587 is a gapful number since it is divisible by the number (77) formed by its first and last digit.

72197587 is a deficient number, since it is larger than the sum of its proper divisors (24224813).

72197587 is a wasteful number, since it uses less digits than its factorization.

72197587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 907.

The product of its digits is 246960, while the sum is 46.

The square root of 72197587 is about 8496.9163229962. The cubic root of 72197587 is about 416.3969702887.

The spelling of 72197587 in words is "seventy-two million, one hundred ninety-seven thousand, five hundred eighty-seven".