91149144 has 32 divisors (see below), whose sum is σ = 228795840. Its totient is φ = 30260000.

The previous prime is 91149089. The next prime is 91149169. The reversal of 91149144 is 44194119.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1542 + ... + 13589.

It is an arithmetic number, because the mean of its divisors is an integer number (7149870).

Almost surely, 2^91149144 is an apocalyptic number.

It is an amenable number.

91149144 is an abundant number, since it is smaller than the sum of its proper divisors (137646696).

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

91149144 is a wasteful number, since it uses less digits than its factorization.

91149144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15391 (or 15387 counting only the distinct ones).

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

The square root of 91149144 is about 9547.2060834571. The cubic root of 91149144 is about 450.0397397003.

The spelling of 91149144 in words is "ninety-one million, one hundred forty-nine thousand, one hundred forty-four".