16939887 has 8 divisors (see below), whose sum is σ = 23775360. Its totient is φ = 10698840.

The previous prime is 16939861. The next prime is 16939889. The reversal of 16939887 is 78893961.

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

It is not a de Polignac number, because 16939887 - 2⁶ = 16939823 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16939889) 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, 148539 + ... + 148652.

It is an arithmetic number, because the mean of its divisors is an integer number (2971920).

Almost surely, 2^16939887 is an apocalyptic number.

16939887 is a deficient number, since it is larger than the sum of its proper divisors (6835473).

16939887 is a wasteful number, since it uses less digits than its factorization.

16939887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297213.

The product of its digits is 653184, while the sum is 51.

The square root of 16939887 is about 4115.8093979192. The cubic root of 16939887 is about 256.8247277020.

The spelling of 16939887 in words is "sixteen million, nine hundred thirty-nine thousand, eight hundred eighty-seven".