16981337 has 4 divisors (see below), whose sum is σ = 17719680. Its totient is φ = 16242996.

The previous prime is 16981331. The next prime is 16981343. The reversal of 16981337 is 73318961.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (16981331) and next prime (16981343).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16981337 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16981337.

It is not an unprimeable number, because it can be changed into a prime (16981331) 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, 369137 + ... + 369182.

It is an arithmetic number, because the mean of its divisors is an integer number (4429920).

Almost surely, 2^16981337 is an apocalyptic number.

It is an amenable number.

16981337 is a deficient number, since it is larger than the sum of its proper divisors (738343).

16981337 is an equidigital number, since it uses as much as digits as its factorization.

16981337 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 738342.

The product of its digits is 27216, while the sum is 38.

The square root of 16981337 is about 4120.8417829371. The cubic root of 16981337 is about 257.0340308310.

The spelling of 16981337 in words is "sixteen million, nine hundred eighty-one thousand, three hundred thirty-seven".