16961091 has 16 divisors (see below), whose sum is σ = 27206400. Its totient is φ = 9181728.

The previous prime is 16961089. The next prime is 16961099. The reversal of 16961091 is 19016961.

It is not a de Polignac number, because 16961091 - 2¹ = 16961089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16961099) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20856 + ... + 21653.

It is an arithmetic number, because the mean of its divisors is an integer number (1700400).

Almost surely, 2^16961091 is an apocalyptic number.

16961091 is a deficient number, since it is larger than the sum of its proper divisors (10245309).

16961091 is a wasteful number, since it uses less digits than its factorization.

16961091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42538.

The product of its (nonzero) digits is 2916, while the sum is 33.

The square root of 16961091 is about 4118.3845133741. The cubic root of 16961091 is about 256.9318405955.

The spelling of 16961091 in words is "sixteen million, nine hundred sixty-one thousand, ninety-one".