16987913 has 8 divisors (see below), whose sum is σ = 18047520. Its totient is φ = 15935040.

The previous prime is 16987909. The next prime is 16987963. The reversal of 16987913 is 31978961.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16987913 - 2² = 16987909 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16987963) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4118 + ... + 7136.

It is an arithmetic number, because the mean of its divisors is an integer number (2255940).

Almost surely, 2^16987913 is an apocalyptic number.

It is an amenable number.

16987913 is a deficient number, since it is larger than the sum of its proper divisors (1059607).

16987913 is a wasteful number, since it uses less digits than its factorization.

16987913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3367.

The product of its digits is 81648, while the sum is 44.

The square root of 16987913 is about 4121.6396009355. The cubic root of 16987913 is about 257.0672052438.

The spelling of 16987913 in words is "sixteen million, nine hundred eighty-seven thousand, nine hundred thirteen".