91144194 has 32 divisors (see below), whose sum is σ = 184680000. Its totient is φ = 29985984.

The previous prime is 91144181. The next prime is 91144201. The reversal of 91144194 is 49144119.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 240297 + ... + 240675.

It is an arithmetic number, because the mean of its divisors is an integer number (5771250).

Almost surely, 2^91144194 is an apocalyptic number.

91144194 is an abundant number, since it is smaller than the sum of its proper divisors (93535806).

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

91144194 is a wasteful number, since it uses less digits than its factorization.

91144194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 802.

The product of its digits is 5184, while the sum is 33.

The square root of 91144194 is about 9546.9468417919. The cubic root of 91144194 is about 450.0315928437.

The spelling of 91144194 in words is "ninety-one million, one hundred forty-four thousand, one hundred ninety-four".