91098553 has 32 divisors (see below), whose sum is σ = 118587392. Its totient is φ = 68040000.

The previous prime is 91098517. The next prime is 91098569. The reversal of 91098553 is 35589019.

It is a de Polignac number, because none of the positive numbers 2^k-91098553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (91098583) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 120928 + ... + 121678.

It is an arithmetic number, because the mean of its divisors is an integer number (3705856).

Almost surely, 2^91098553 is an apocalyptic number.

It is an amenable number.

91098553 is a deficient number, since it is larger than the sum of its proper divisors (27488839).

91098553 is a wasteful number, since it uses less digits than its factorization.

91098553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 845.

The product of its (nonzero) digits is 48600, while the sum is 40.

The square root of 91098553 is about 9544.5561971210. The cubic root of 91098553 is about 449.9564616313.

The spelling of 91098553 in words is "ninety-one million, ninety-eight thousand, five hundred fifty-three".