15998967 has 12 divisors (see below), whose sum is σ = 23647624. Its totient is φ = 10417680.

The previous prime is 15998963. The next prime is 15998977. The reversal of 15998967 is 76989951.

It is not a de Polignac number, because 15998967 - 2² = 15998963 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15998963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20284 + ... + 21057.

Almost surely, 2^15998967 is an apocalyptic number.

15998967 is a deficient number, since it is larger than the sum of its proper divisors (7648657).

15998967 is a wasteful number, since it uses less digits than its factorization.

15998967 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41390 (or 41387 counting only the distinct ones).

The product of its digits is 1224720, while the sum is 54.

The square root of 15998967 is about 3999.8708729158. The cubic root of 15998967 is about 251.9787869521.

The spelling of 15998967 in words is "fifteen million, nine hundred ninety-eight thousand, nine hundred sixty-seven".