17872313 has 2 divisors, whose sum is σ = 17872314. Its totient is φ = 17872312.

The previous prime is 17872303. The next prime is 17872343. The reversal of 17872313 is 31327871.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10705984 + 7166329 = 3272^2 + 2677^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-17872313 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 17872313.

It is not a weakly prime, because it can be changed into another prime (17872303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8936156 + 8936157.

It is an arithmetic number, because the mean of its divisors is an integer number (8936157).

Almost surely, 2^17872313 is an apocalyptic number.

It is an amenable number.

17872313 is a deficient number, since it is larger than the sum of its proper divisors (1).

17872313 is an equidigital number, since it uses as much as digits as its factorization.

17872313 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7056, while the sum is 32.

The square root of 17872313 is about 4227.5658480975. The cubic root of 17872313 is about 261.4529745915.

The spelling of 17872313 in words is "seventeen million, eight hundred seventy-two thousand, three hundred thirteen".