16919641 has 4 divisors (see below), whose sum is σ = 17914932. Its totient is φ = 15924352.

The previous prime is 16919629. The next prime is 16919647. The reversal of 16919641 is 14691961.

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 6864400 + 10055241 = 2620^2 + 3171^2 .

It is a cyclic number.

It is not a de Polignac number, because 16919641 - 2⁹ = 16919129 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16919641.

It is not an unprimeable number, because it can be changed into a prime (16919647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 497620 + ... + 497653.

It is an arithmetic number, because the mean of its divisors is an integer number (4478733).

Almost surely, 2^16919641 is an apocalyptic number.

It is an amenable number.

16919641 is a deficient number, since it is larger than the sum of its proper divisors (995291).

16919641 is an equidigital number, since it uses as much as digits as its factorization.

16919641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 995290.

The product of its digits is 11664, while the sum is 37.

The square root of 16919641 is about 4113.3491220659. The cubic root of 16919641 is about 256.7223707361.

The spelling of 16919641 in words is "sixteen million, nine hundred nineteen thousand, six hundred forty-one".