91680196 has 6 divisors (see below), whose sum is σ = 160440350. Its totient is φ = 45840096.

The previous prime is 91680181. The next prime is 91680203. The reversal of 91680196 is 69108619.

It can be written as a sum of positive squares in only one way, i.e., 54908100 + 36772096 = 7410^2 + 6064^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11460021 + ... + 11460028.

Almost surely, 2^91680196 is an apocalyptic number.

It is an amenable number.

91680196 is a deficient number, since it is larger than the sum of its proper divisors (68760154).

91680196 is a wasteful number, since it uses less digits than its factorization.

91680196 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22920053 (or 22920051 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 40.

The square root of 91680196 is about 9574.9775978850. The cubic root of 91680196 is about 450.9120530966.

The spelling of 91680196 in words is "ninety-one million, six hundred eighty thousand, one hundred ninety-six".