72397317 has 16 divisors (see below), whose sum is σ = 98003520. Its totient is φ = 47532672.

The previous prime is 72397309. The next prime is 72397327. The reversal of 72397317 is 71379327.

It is not a de Polignac number, because 72397317 - 2³ = 72397309 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72397327) 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, 105658 + ... + 106340.

It is an arithmetic number, because the mean of its divisors is an integer number (6125220).

Almost surely, 2^72397317 is an apocalyptic number.

It is an amenable number.

72397317 is a deficient number, since it is larger than the sum of its proper divisors (25606203).

72397317 is a wasteful number, since it uses less digits than its factorization.

72397317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1172.

The product of its digits is 55566, while the sum is 39.

The square root of 72397317 is about 8508.6612930590. The cubic root of 72397317 is about 416.7805952636.

The spelling of 72397317 in words is "seventy-two million, three hundred ninety-seven thousand, three hundred seventeen".