16911961 has 8 divisors (see below), whose sum is σ = 18558144. Its totient is φ = 15283920.

The previous prime is 16911953. The next prime is 16912003.

16911961 is nontrivially palindromic in base 10.

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

It is a cyclic number.

It is not a de Polignac number, because 16911961 - 2³ = 16911953 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16911911) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2541 + ... + 6346.

It is an arithmetic number, because the mean of its divisors is an integer number (2319768).

Almost surely, 2^16911961 is an apocalyptic number.

16911961 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

16911961 is a deficient number, since it is larger than the sum of its proper divisors (1646183).

16911961 is a wasteful number, since it uses less digits than its factorization.

16911961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9071.

The product of its digits is 2916, while the sum is 34.

The square root of 16911961 is about 4112.4154702559. The cubic root of 16911961 is about 256.6835218781.

The spelling of 16911961 in words is "sixteen million, nine hundred eleven thousand, nine hundred sixty-one".