72786317 has 8 divisors (see below), whose sum is σ = 75394200. Its totient is φ = 70185024.

The previous prime is 72786293. The next prime is 72786341. The reversal of 72786317 is 71368727.

It is an interprime number because it is at equal distance from previous prime (72786293) and next prime (72786341).

It can be written as a sum of positive squares in 4 ways, for example, as 43744996 + 29041321 = 6614^2 + 5389^2 .

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 72786317 - 2¹² = 72782221 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72786347) 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, 34859 + ... + 36887.

It is an arithmetic number, because the mean of its divisors is an integer number (9424275).

Almost surely, 2^72786317 is an apocalyptic number.

It is an amenable number.

72786317 is a deficient number, since it is larger than the sum of its proper divisors (2607883).

72786317 is a wasteful number, since it uses less digits than its factorization.

72786317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3295.

The product of its digits is 98784, while the sum is 41.

The square root of 72786317 is about 8531.4897292325. The cubic root of 72786317 is about 417.5257340084.

The spelling of 72786317 in words is "seventy-two million, seven hundred eighty-six thousand, three hundred seventeen".