16649233 has 6 divisors (see below), whose sum is σ = 17013266. Its totient is φ = 16292832.

The previous prime is 16649221. The next prime is 16649249. The reversal of 16649233 is 33294661.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 13786369 + 2862864 = 3713^2 + 1692^2 .

It is a de Polignac number, because none of the positive numbers 2^k-16649233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16649203) 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 in 5 ways as a sum of consecutive naturals, for example, 1560 + ... + 5977.

Almost surely, 2^16649233 is an apocalyptic number.

It is an amenable number.

16649233 is a deficient number, since it is larger than the sum of its proper divisors (364033).

16649233 is an frugal number, since it uses more digits than its factorization.

16649233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7631 (or 7584 counting only the distinct ones).

The product of its digits is 23328, while the sum is 34.

The square root of 16649233 is about 4080.3471666024. The cubic root of 16649233 is about 255.3473825042.

The spelling of 16649233 in words is "sixteen million, six hundred forty-nine thousand, two hundred thirty-three".