16642899 has 36 divisors (see below), whose sum is σ = 30126096. Its totient is φ = 8775648.

The previous prime is 16642889. The next prime is 16642931. The reversal of 16642899 is 99824661.

It is a happy number.

It is not a de Polignac number, because 16642899 - 2⁷ = 16642771 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16642819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 4282 + ... + 7184.

It is an arithmetic number, because the mean of its divisors is an integer number (836836).

Almost surely, 2^16642899 is an apocalyptic number.

16642899 is a deficient number, since it is larger than the sum of its proper divisors (13483197).

16642899 is a wasteful number, since it uses less digits than its factorization.

16642899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2936 (or 2926 counting only the distinct ones).

The product of its digits is 186624, while the sum is 45.

The square root of 16642899 is about 4079.5709333213. The cubic root of 16642899 is about 255.3149971191.

The spelling of 16642899 in words is "sixteen million, six hundred forty-two thousand, eight hundred ninety-nine".