91098002 has 18 divisors (see below), whose sum is σ = 145524447. Its totient is φ = 42761664.

The previous prime is 91097987. The next prime is 91098031. The reversal of 91098002 is 20089019.

It can be written as a sum of positive squares in 5 ways, for example, as 82283041 + 8814961 = 9071^2 + 2969^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=6749.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 229268 + ... + 229664.

Almost surely, 2^91098002 is an apocalyptic number.

91098002 is a deficient number, since it is larger than the sum of its proper divisors (54426445).

91098002 is an equidigital number, since it uses as much as digits as its factorization.

91098002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 830 (or 416 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 29.

The square root of 91098002 is about 9544.5273324560. The cubic root of 91098002 is about 449.9555544581.

The spelling of 91098002 in words is "ninety-one million, ninety-eight thousand, two".