16899965 has 8 divisors (see below), whose sum is σ = 20315448. Its totient is φ = 13496320.

The previous prime is 16899959. The next prime is 16899973. The reversal of 16899965 is 56999861.

It can be written as a sum of positive squares in 4 ways, for example, as 4656964 + 12243001 = 2158^2 + 3499^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 16899965 - 2⁸ = 16899709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 569 + ... + 5841.

It is an arithmetic number, because the mean of its divisors is an integer number (2539431).

Almost surely, 2^16899965 is an apocalyptic number.

It is an amenable number.

16899965 is a deficient number, since it is larger than the sum of its proper divisors (3415483).

16899965 is an equidigital number, since it uses as much as digits as its factorization.

16899965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5919.

The product of its digits is 1049760, while the sum is 53.

The square root of 16899965 is about 4110.9567013045. The cubic root of 16899965 is about 256.6228172313.

The spelling of 16899965 in words is "sixteen million, eight hundred ninety-nine thousand, nine hundred sixty-five".