16699069 has 4 divisors (see below), whose sum is σ = 16708320. Its totient is φ = 16689820.

The previous prime is 16699063. The next prime is 16699073. The reversal of 16699069 is 96099661.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 16699069 - 2¹⁷ = 16567997 is a prime.

It is a super-2 number, since 2×16699069² = 557717810933522, 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 (16699063) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 937 + ... + 5854.

It is an arithmetic number, because the mean of its divisors is an integer number (4177080).

Almost surely, 2^16699069 is an apocalyptic number.

It is an amenable number.

16699069 is a deficient number, since it is larger than the sum of its proper divisors (9251).

16699069 is an equidigital number, since it uses as much as digits as its factorization.

16699069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9250.

The product of its (nonzero) digits is 157464, while the sum is 46.

The square root of 16699069 is about 4086.4494368584. The cubic root of 16699069 is about 255.6019050638.

It can be divided in two parts, 166 and 99069, that added together give a triangular number (99235 = T₄₄₅).

The spelling of 16699069 in words is "sixteen million, six hundred ninety-nine thousand, sixty-nine".