91000194 has 16 divisors (see below), whose sum is σ = 184494432. Its totient is φ = 29917728.

The previous prime is 91000193. The next prime is 91000207. The reversal of 91000194 is 49100019.

It is not an unprimeable number, because it can be changed into a prime (91000193) 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, 103444 + ... + 104319.

It is an arithmetic number, because the mean of its divisors is an integer number (11530902).

Almost surely, 2^91000194 is an apocalyptic number.

91000194 is an abundant number, since it is smaller than the sum of its proper divisors (93494238).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91000194 is a wasteful number, since it uses less digits than its factorization.

91000194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207841.

The product of its (nonzero) digits is 324, while the sum is 24.

The square root of 91000194 is about 9539.4021825270. The cubic root of 91000194 is about 449.7944641612.

The spelling of 91000194 in words is "ninety-one million, one hundred ninety-four", and thus it is an aban number.