16689994 has 8 divisors (see below), whose sum is σ = 25135488. Its totient is φ = 8311500.

The previous prime is 16689941. The next prime is 16690001. The reversal of 16689994 is 49998661.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16122 + ... + 17125.

It is an arithmetic number, because the mean of its divisors is an integer number (3141936).

Almost surely, 2^16689994 is an apocalyptic number.

16689994 is a deficient number, since it is larger than the sum of its proper divisors (8445494).

16689994 is a wasteful number, since it uses less digits than its factorization.

16689994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33500.

The product of its digits is 839808, while the sum is 52.

The square root of 16689994 is about 4085.3389088300. The cubic root of 16689994 is about 255.5555949450. Note that the first 4 decimals are identical.

The spelling of 16689994 in words is "sixteen million, six hundred eighty-nine thousand, nine hundred ninety-four".