16997131 has 4 divisors (see below), whose sum is σ = 17188200. Its totient is φ = 16806064.

The previous prime is 16997111. The next prime is 16997143. The reversal of 16997131 is 13179961.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13179961 = 353 ⋅37337.

It is a cyclic number.

It is not a de Polignac number, because 16997131 - 2⁷ = 16997003 is a prime.

It is a super-2 number, since 2×16997131² = 577804924462322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16997111) 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 3 ways as a sum of consecutive naturals, for example, 95401 + ... + 95578.

It is an arithmetic number, because the mean of its divisors is an integer number (4297050).

Almost surely, 2^16997131 is an apocalyptic number.

16997131 is a deficient number, since it is larger than the sum of its proper divisors (191069).

16997131 is an equidigital number, since it uses as much as digits as its factorization.

16997131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191068.

The product of its digits is 10206, while the sum is 37.

The square root of 16997131 is about 4122.7576935833. The cubic root of 16997131 is about 257.1136935327.

The spelling of 16997131 in words is "sixteen million, nine hundred ninety-seven thousand, one hundred thirty-one".