91189479 has 16 divisors (see below), whose sum is σ = 130664448. Its totient is φ = 56360832.

The previous prime is 91189477. The next prime is 91189499. The reversal of 91189479 is 97498119.

It is not a de Polignac number, because 91189479 - 2¹ = 91189477 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91189477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9927 + ... + 16760.

It is an arithmetic number, because the mean of its divisors is an integer number (8166528).

Almost surely, 2^91189479 is an apocalyptic number.

91189479 is a deficient number, since it is larger than the sum of its proper divisors (39474969).

91189479 is a wasteful number, since it uses less digits than its factorization.

91189479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26774.

The product of its digits is 163296, while the sum is 48.

The square root of 91189479 is about 9549.3182479170. The cubic root of 91189479 is about 450.1061132474.

The spelling of 91189479 in words is "ninety-one million, one hundred eighty-nine thousand, four hundred seventy-nine".