15994117 has 2 divisors, whose sum is σ = 15994118. Its totient is φ = 15994116.

The previous prime is 15994079. The next prime is 15994123. The reversal of 15994117 is 71149951.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15992001 + 2116 = 3999^2 + 46^2 .

It is a cyclic number.

It is not a de Polignac number, because 15994117 - 2¹¹ = 15992069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15994157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7997058 + 7997059.

It is an arithmetic number, because the mean of its divisors is an integer number (7997059).

Almost surely, 2^15994117 is an apocalyptic number.

It is an amenable number.

15994117 is a deficient number, since it is larger than the sum of its proper divisors (1).

15994117 is an equidigital number, since it uses as much as digits as its factorization.

15994117 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11340, while the sum is 37.

The square root of 15994117 is about 3999.2645573905. The cubic root of 15994117 is about 251.9533223783.

The spelling of 15994117 in words is "fifteen million, nine hundred ninety-four thousand, one hundred seventeen".