40872317 has 4 divisors (see below), whose sum is σ = 41822880. Its totient is φ = 39921756.

The previous prime is 40872289. The next prime is 40872319. The reversal of 40872317 is 71327804.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40872317 - 2⁶ = 40872253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40872319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 475217 + ... + 475302.

It is an arithmetic number, because the mean of its divisors is an integer number (10455720).

Almost surely, 2^40872317 is an apocalyptic number.

It is an amenable number.

40872317 is a deficient number, since it is larger than the sum of its proper divisors (950563).

40872317 is an equidigital number, since it uses as much as digits as its factorization.

40872317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 950562.

The product of its (nonzero) digits is 9408, while the sum is 32.

The square root of 40872317 is about 6393.1460956246. The cubic root of 40872317 is about 344.4634016352.

The spelling of 40872317 in words is "forty million, eight hundred seventy-two thousand, three hundred seventeen".