91289982 has 16 divisors (see below), whose sum is σ = 208662912. Its totient is φ = 26082840.

The previous prime is 91289981. The next prime is 91289993. The reversal of 91289982 is 28998219.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91289981) 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 7 ways as a sum of consecutive naturals, for example, 1086744 + ... + 1086827.

It is an arithmetic number, because the mean of its divisors is an integer number (13041432).

Almost surely, 2^91289982 is an apocalyptic number.

91289982 is an abundant number, since it is smaller than the sum of its proper divisors (117372930).

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

91289982 is a wasteful number, since it uses less digits than its factorization.

91289982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2173583.

The product of its digits is 186624, while the sum is 48.

The square root of 91289982 is about 9554.5791116093. The cubic root of 91289982 is about 450.2714115774.

It can be divided in two parts, 9128 and 9982, that added together give a triangular number (19110 = T₁₉₅).

The spelling of 91289982 in words is "ninety-one million, two hundred eighty-nine thousand, nine hundred eighty-two".