19313117 has 2 divisors, whose sum is σ = 19313118. Its totient is φ = 19313116.

The previous prime is 19313113. The next prime is 19313141. The reversal of 19313117 is 71131391.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9665881 + 9647236 = 3109^2 + 3106^2 .

It is a cyclic number.

It is not a de Polignac number, because 19313117 - 2² = 19313113 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19313111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9656558 + 9656559.

It is an arithmetic number, because the mean of its divisors is an integer number (9656559).

Almost surely, 2^19313117 is an apocalyptic number.

It is an amenable number.

19313117 is a deficient number, since it is larger than the sum of its proper divisors (1).

19313117 is an equidigital number, since it uses as much as digits as its factorization.

19313117 is an evil number, because the sum of its binary digits is even.

The product of its digits is 567, while the sum is 26.

The square root of 19313117 is about 4394.6691570584. The cubic root of 19313117 is about 268.2980135175.

The spelling of 19313117 in words is "nineteen million, three hundred thirteen thousand, one hundred seventeen".