72070017 has 16 divisors (see below), whose sum is σ = 103731840. Its totient is φ = 44371712.

The previous prime is 72070001. The next prime is 72070051. The reversal of 72070017 is 71007027.

It is a cyclic number.

It is not a de Polignac number, because 72070017 - 2⁴ = 72070001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72070057) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16008 + ... + 20009.

It is an arithmetic number, because the mean of its divisors is an integer number (6483240).

Almost surely, 2^72070017 is an apocalyptic number.

It is an amenable number.

72070017 is a deficient number, since it is larger than the sum of its proper divisors (31661823).

72070017 is a wasteful number, since it uses less digits than its factorization.

72070017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36072.

The product of its (nonzero) digits is 686, while the sum is 24.

The square root of 72070017 is about 8489.4061629775. The cubic root of 72070017 is about 416.1515739109.

The spelling of 72070017 in words is "seventy-two million, seventy thousand, seventeen".