16961691 has 8 divisors (see below), whose sum is σ = 22741264. Its totient is φ = 11244960.

The previous prime is 16961677. The next prime is 16961729. The reversal of 16961691 is 19616961.

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

It is not a de Polignac number, because 16961691 - 2⁶ = 16961627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16961611) 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, 15076 + ... + 16161.

It is an arithmetic number, because the mean of its divisors is an integer number (2842658).

Almost surely, 2^16961691 is an apocalyptic number.

16961691 is a deficient number, since it is larger than the sum of its proper divisors (5779573).

16961691 is a wasteful number, since it uses less digits than its factorization.

16961691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31421.

The product of its digits is 17496, while the sum is 39.

The square root of 16961691 is about 4118.4573568267. The cubic root of 16961691 is about 256.9348702215.

The spelling of 16961691 in words is "sixteen million, nine hundred sixty-one thousand, six hundred ninety-one".