91690156 has 12 divisors (see below), whose sum is σ = 160545168. Its totient is φ = 45820112.

The previous prime is 91690153. The next prime is 91690187. The reversal of 91690156 is 65109619.

It is not an unprimeable number, because it can be changed into a prime (91690153) 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, 3825 + ... + 14071.

It is an arithmetic number, because the mean of its divisors is an integer number (13378764).

Almost surely, 2^91690156 is an apocalyptic number.

It is an amenable number.

91690156 is a deficient number, since it is larger than the sum of its proper divisors (68855012).

91690156 is a wasteful number, since it uses less digits than its factorization.

91690156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12488 (or 12486 counting only the distinct ones).

The product of its (nonzero) digits is 14580, while the sum is 37.

The square root of 91690156 is about 9575.4976894154. The cubic root of 91690156 is about 450.9283813100.

The spelling of 91690156 in words is "ninety-one million, six hundred ninety thousand, one hundred fifty-six".