72187017 has 8 divisors (see below), whose sum is σ = 109999296. Its totient is φ = 41249712.

The previous prime is 72187013. The next prime is 72187033. The reversal of 72187017 is 71078127.

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

It is not a de Polignac number, because 72187017 - 2² = 72187013 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72187013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1718718 + ... + 1718759.

It is an arithmetic number, because the mean of its divisors is an integer number (13749912).

Almost surely, 2^72187017 is an apocalyptic number.

It is an amenable number.

72187017 is a deficient number, since it is larger than the sum of its proper divisors (37812279).

72187017 is a wasteful number, since it uses less digits than its factorization.

72187017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3437487.

The product of its (nonzero) digits is 5488, while the sum is 33.

The square root of 72187017 is about 8496.2943098742. The cubic root of 72187017 is about 416.3766485995.

The spelling of 72187017 in words is "seventy-two million, one hundred eighty-seven thousand, seventeen".