15949117 has 2 divisors, whose sum is σ = 15949118. Its totient is φ = 15949116.

The previous prime is 15949081. The next prime is 15949127. The reversal of 15949117 is 71194951.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15729156 + 219961 = 3966^2 + 469^2 .

It is an emirp because it is prime and its reverse (71194951) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 15949117 - 2¹⁵ = 15916349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15949127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7974558 + 7974559.

It is an arithmetic number, because the mean of its divisors is an integer number (7974559).

Almost surely, 2^15949117 is an apocalyptic number.

It is an amenable number.

15949117 is a deficient number, since it is larger than the sum of its proper divisors (1).

15949117 is an equidigital number, since it uses as much as digits as its factorization.

15949117 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 15949117 is about 3993.6345601469. The cubic root of 15949117 is about 251.7168073032.

The spelling of 15949117 in words is "fifteen million, nine hundred forty-nine thousand, one hundred seventeen".