16769921 has 8 divisors (see below), whose sum is σ = 19999104. Its totient is φ = 13749120.

The previous prime is 16769911. The next prime is 16769923. The reversal of 16769921 is 12996761.

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

It is not a de Polignac number, because 16769921 - 2¹⁰ = 16768897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16769923) 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, 51920 + ... + 52241.

It is an arithmetic number, because the mean of its divisors is an integer number (2499888).

Almost surely, 2^16769921 is an apocalyptic number.

It is an amenable number.

16769921 is a deficient number, since it is larger than the sum of its proper divisors (3229183).

16769921 is a wasteful number, since it uses less digits than its factorization.

16769921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104191.

The product of its digits is 40824, while the sum is 41.

The square root of 16769921 is about 4095.1094002481. The cubic root of 16769921 is about 255.9628903321.

The spelling of 16769921 in words is "sixteen million, seven hundred sixty-nine thousand, nine hundred twenty-one".