16689946 has 16 divisors (see below), whose sum is σ = 30812544. Its totient is φ = 6602544.

The previous prime is 16689941. The next prime is 16690001. The reversal of 16689946 is 64998661.

It is a self number, because there is not a number n which added to its sum of digits gives 16689946.

It is not an unprimeable number, because it can be changed into a prime (16689941) 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, 45670 + ... + 46033.

It is an arithmetic number, because the mean of its divisors is an integer number (1925784).

Almost surely, 2^16689946 is an apocalyptic number.

16689946 is a deficient number, since it is larger than the sum of its proper divisors (14122598).

16689946 is a wasteful number, since it uses less digits than its factorization.

16689946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91725.

The product of its digits is 559872, while the sum is 49.

The square root of 16689946 is about 4085.3330341601. Note that the first 3 decimals coincide. The cubic root of 16689946 is about 255.5553499543. Note that the first 3 decimals are identical.

The spelling of 16689946 in words is "sixteen million, six hundred eighty-nine thousand, nine hundred forty-six".