16938969 has 4 divisors (see below), whose sum is σ = 22585296. Its totient is φ = 11292644.

The previous prime is 16938931. The next prime is 16938979. The reversal of 16938969 is 96983961.

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 a cyclic number.

It is not a de Polignac number, because 16938969 - 2¹¹ = 16936921 is a prime.

It is a super-2 number, since 2×16938969² = 573857341565922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16938979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2823159 + ... + 2823164.

It is an arithmetic number, because the mean of its divisors is an integer number (5646324).

Almost surely, 2^16938969 is an apocalyptic number.

It is an amenable number.

16938969 is a deficient number, since it is larger than the sum of its proper divisors (5646327).

16938969 is an equidigital number, since it uses as much as digits as its factorization.

16938969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5646326.

The product of its digits is 629856, while the sum is 51.

The square root of 16938969 is about 4115.6978752090. The cubic root of 16938969 is about 256.8200883685.

The spelling of 16938969 in words is "sixteen million, nine hundred thirty-eight thousand, nine hundred sixty-nine".