16689154 has 4 divisors (see below), whose sum is σ = 25033734. Its totient is φ = 8344576.

The previous prime is 16689143. The next prime is 16689157. The reversal of 16689154 is 45198661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 45198661 = 59 ⋅766079.

It can be written as a sum of positive squares in only one way, i.e., 12780625 + 3908529 = 3575^2 + 1977^2 .

It is a super-2 number, since 2×16689154² = 557055722471432, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (16689157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4172287 + ... + 4172290.

Almost surely, 2^16689154 is an apocalyptic number.

16689154 is a deficient number, since it is larger than the sum of its proper divisors (8344580).

16689154 is an equidigital number, since it uses as much as digits as its factorization.

16689154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8344579.

The product of its digits is 51840, while the sum is 40.

The square root of 16689154 is about 4085.2361008882. The cubic root of 16689154 is about 255.5513075398.

The spelling of 16689154 in words is "sixteen million, six hundred eighty-nine thousand, one hundred fifty-four".