16631449 has 2 divisors, whose sum is σ = 16631450. Its totient is φ = 16631448.

The previous prime is 16631437. The next prime is 16631501. The reversal of 16631449 is 94413661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13505625 + 3125824 = 3675^2 + 1768^2 .

It is a cyclic number.

It is not a de Polignac number, because 16631449 - 2¹¹ = 16629401 is a prime.

It is not a weakly prime, because it can be changed into another prime (16631429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8315724 + 8315725.

It is an arithmetic number, because the mean of its divisors is an integer number (8315725).

Almost surely, 2^16631449 is an apocalyptic number.

It is an amenable number.

16631449 is a deficient number, since it is larger than the sum of its proper divisors (1).

16631449 is an equidigital number, since it uses as much as digits as its factorization.

16631449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15552, while the sum is 34.

The square root of 16631449 is about 4078.1673580176. The cubic root of 16631449 is about 255.2564330557.

The spelling of 16631449 in words is "sixteen million, six hundred thirty-one thousand, four hundred forty-nine".