72317749 has 8 divisors (see below), whose sum is σ = 82712448. Its totient is φ = 61938960.

The previous prime is 72317747. The next prime is 72317753. The reversal of 72317749 is 94771327.

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 72317749 - 2¹ = 72317747 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72317741) 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, 8304 + ... + 14614.

It is an arithmetic number, because the mean of its divisors is an integer number (10339056).

Almost surely, 2^72317749 is an apocalyptic number.

It is an amenable number.

72317749 is a deficient number, since it is larger than the sum of its proper divisors (10394699).

72317749 is a wasteful number, since it uses less digits than its factorization.

72317749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7955.

The product of its digits is 74088, while the sum is 40.

The square root of 72317749 is about 8503.9843014907. The cubic root of 72317749 is about 416.6278522421.

The spelling of 72317749 in words is "seventy-two million, three hundred seventeen thousand, seven hundred forty-nine".