16709965 has 4 divisors (see below), whose sum is σ = 20051964. Its totient is φ = 13367968.

The previous prime is 16709951. The next prime is 16709971. The reversal of 16709965 is 56990761.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2669956 + 14040009 = 1634^2 + 3747^2 .

It is a cyclic number.

It is not a de Polignac number, because 16709965 - 2⁵ = 16709933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1670992 + ... + 1671001.

It is an arithmetic number, because the mean of its divisors is an integer number (5012991).

Almost surely, 2^16709965 is an apocalyptic number.

It is an amenable number.

16709965 is a deficient number, since it is larger than the sum of its proper divisors (3341999).

16709965 is an equidigital number, since it uses as much as digits as its factorization.

16709965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3341998.

The product of its (nonzero) digits is 102060, while the sum is 43.

The square root of 16709965 is about 4087.7824061464. The cubic root of 16709965 is about 255.6574856641.

The spelling of 16709965 in words is "sixteen million, seven hundred nine thousand, nine hundred sixty-five".