16696989 has 8 divisors (see below), whose sum is σ = 24736320. Its totient is φ = 11131308.

The previous prime is 16696987. The next prime is 16696997. The reversal of 16696989 is 98969661.

It is not a de Polignac number, because 16696989 - 2¹ = 16696987 is a prime.

It is a super-2 number, since 2×16696989² = 557578883332242, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16696987) 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, 309177 + ... + 309230.

It is an arithmetic number, because the mean of its divisors is an integer number (3092040).

Almost surely, 2^16696989 is an apocalyptic number.

It is an amenable number.

16696989 is a deficient number, since it is larger than the sum of its proper divisors (8039331).

16696989 is an equidigital number, since it uses as much as digits as its factorization.

16696989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 618416 (or 618410 counting only the distinct ones).

The product of its digits is 1259712, while the sum is 54.

The square root of 16696989 is about 4086.1949292710. The cubic root of 16696989 is about 255.5912922159.

The spelling of 16696989 in words is "sixteen million, six hundred ninety-six thousand, nine hundred eighty-nine".