72037217 has 8 divisors (see below), whose sum is σ = 82689600. Its totient is φ = 61475184.

The previous prime is 72037213. The next prime is 72037237. The reversal of 72037217 is 71273027.

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 72037217 - 2² = 72037213 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72037217.

It is not an unprimeable number, because it can be changed into a prime (72037213) 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, 20867 + ... + 24072.

It is an arithmetic number, because the mean of its divisors is an integer number (10336200).

Almost surely, 2^72037217 is an apocalyptic number.

It is an amenable number.

72037217 is a deficient number, since it is larger than the sum of its proper divisors (10652383).

72037217 is a wasteful number, since it uses less digits than its factorization.

72037217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45175.

The product of its (nonzero) digits is 4116, while the sum is 29.

The square root of 72037217 is about 8487.4741236719. The cubic root of 72037217 is about 416.0884323371.

The spelling of 72037217 in words is "seventy-two million, thirty-seven thousand, two hundred seventeen".