16998131 has 2 divisors, whose sum is σ = 16998132. Its totient is φ = 16998130.

The previous prime is 16998109. The next prime is 16998139. The reversal of 16998131 is 13189961.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16998131 - 2¹⁰ = 16997107 is a prime.

It is a super-2 number, since 2×16998131² = 577872914986322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (16998139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8499065 + 8499066.

It is an arithmetic number, because the mean of its divisors is an integer number (8499066).

Almost surely, 2^16998131 is an apocalyptic number.

16998131 is a deficient number, since it is larger than the sum of its proper divisors (1).

16998131 is an equidigital number, since it uses as much as digits as its factorization.

16998131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11664, while the sum is 38.

The square root of 16998131 is about 4122.8789698462. The cubic root of 16998131 is about 257.1187357297.

The spelling of 16998131 in words is "sixteen million, nine hundred ninety-eight thousand, one hundred thirty-one".