91149478 has 32 divisors (see below), whose sum is σ = 169501248. Its totient is φ = 35865600.

The previous prime is 91149473. The next prime is 91149493. The reversal of 91149478 is 87494119.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91149473) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5088 + ... + 14428.

It is an arithmetic number, because the mean of its divisors is an integer number (5296914).

Almost surely, 2^91149478 is an apocalyptic number.

91149478 is a deficient number, since it is larger than the sum of its proper divisors (78351770).

91149478 is a wasteful number, since it uses less digits than its factorization.

91149478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9408.

The product of its digits is 72576, while the sum is 43.

The square root of 91149478 is about 9547.2235754695. The cubic root of 91149478 is about 450.0402893968.

The spelling of 91149478 in words is "ninety-one million, one hundred forty-nine thousand, four hundred seventy-eight".