16919669 has 8 divisors (see below), whose sum is σ = 18264120. Its totient is φ = 15581376.

The previous prime is 16919663. The next prime is 16919677. The reversal of 16919669 is 96691961.

It can be written as a sum of positive squares in 4 ways, for example, as 1787569 + 15132100 = 1337^2 + 3890^2 .

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 16919669 - 2¹² = 16915573 is a prime.

It is a super-2 number, since 2×16919669² = 572550398139122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16919663) 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, 5339 + ... + 7895.

It is an arithmetic number, because the mean of its divisors is an integer number (2283015).

Almost surely, 2^16919669 is an apocalyptic number.

It is an amenable number.

16919669 is a deficient number, since it is larger than the sum of its proper divisors (1344451).

16919669 is a wasteful number, since it uses less digits than its factorization.

16919669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3079.

The product of its digits is 157464, while the sum is 47.

The square root of 16919669 is about 4113.3525256170. The cubic root of 16919669 is about 256.7225123511.

The spelling of 16919669 in words is "sixteen million, nine hundred nineteen thousand, six hundred sixty-nine".