91381154 has 16 divisors (see below), whose sum is σ = 145486368. Its totient is φ = 42898752.

The previous prime is 91381153. The next prime is 91381177. The reversal of 91381154 is 45118319.

It is a self number, because there is not a number n which added to its sum of digits gives 91381154.

It is not an unprimeable number, because it can be changed into a prime (91381151) 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, 12029 + ... + 18095.

It is an arithmetic number, because the mean of its divisors is an integer number (9092898).

Almost surely, 2^91381154 is an apocalyptic number.

91381154 is a deficient number, since it is larger than the sum of its proper divisors (54105214).

91381154 is a wasteful number, since it uses less digits than its factorization.

91381154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6529.

The product of its digits is 4320, while the sum is 32.

The square root of 91381154 is about 9559.3490364146. The cubic root of 91381154 is about 450.4212581997.

The spelling of 91381154 in words is "ninety-one million, three hundred eighty-one thousand, one hundred fifty-four".