15997017 has 12 divisors (see below), whose sum is σ = 22659056. Its totient is φ = 10036800.

The previous prime is 15996997. The next prime is 15997019. The reversal of 15997017 is 71079951.

It is not a de Polignac number, because 15997017 - 2⁷ = 15996889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15997019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8359 + ... + 10092.

Almost surely, 2^15997017 is an apocalyptic number.

15997017 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

15997017 is a deficient number, since it is larger than the sum of its proper divisors (6662039).

15997017 is a wasteful number, since it uses less digits than its factorization.

15997017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18488 (or 18471 counting only the distinct ones).

The product of its (nonzero) digits is 19845, while the sum is 39.

The square root of 15997017 is about 3999.6271076189. The cubic root of 15997017 is about 251.9685492370.

The spelling of 15997017 in words is "fifteen million, nine hundred ninety-seven thousand, seventeen".