16917961 has 4 divisors (see below), whose sum is σ = 17808400. Its totient is φ = 16027524.

The previous prime is 16917937. The next prime is 16917977. The reversal of 16917961 is 16971961.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16917961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16917911) 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, 445191 + ... + 445228.

It is an arithmetic number, because the mean of its divisors is an integer number (4452100).

Almost surely, 2^16917961 is an apocalyptic number.

It is an amenable number.

16917961 is a deficient number, since it is larger than the sum of its proper divisors (890439).

16917961 is an equidigital number, since it uses as much as digits as its factorization.

16917961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 890438.

The product of its digits is 20412, while the sum is 40.

The square root of 16917961 is about 4113.1449038418. The cubic root of 16917961 is about 256.7138735531.

The spelling of 16917961 in words is "sixteen million, nine hundred seventeen thousand, nine hundred sixty-one".