16249989 has 16 divisors (see below), whose sum is σ = 25062912. Its totient is φ = 9172848.

The previous prime is 16249963. The next prime is 16250009. The reversal of 16249989 is 98994261.

It is not a de Polignac number, because 16249989 - 2¹⁹ = 15725701 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16244989) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2919 + ... + 6404.

It is an arithmetic number, because the mean of its divisors is an integer number (1566432).

Almost surely, 2^16249989 is an apocalyptic number.

It is an amenable number.

16249989 is a deficient number, since it is larger than the sum of its proper divisors (8812923).

16249989 is an equidigital number, since it uses as much as digits as its factorization.

16249989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9416.

The product of its digits is 279936, while the sum is 48.

The square root of 16249989 is about 4031.1275097670. The cubic root of 16249989 is about 253.2897938024.

The spelling of 16249989 in words is "sixteen million, two hundred forty-nine thousand, nine hundred eighty-nine".