91605098 has 12 divisors (see below), whose sum is σ = 148791078. Its totient is φ = 42279120.

The previous prime is 91605091. The next prime is 91605109. The reversal of 91605098 is 89050619.

It can be written as a sum of positive squares in 3 ways, for example, as 29084449 + 62520649 = 5393^2 + 7907^2 .

It is not an unprimeable number, because it can be changed into a prime (91605091) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 135173 + ... + 135848.

Almost surely, 2^91605098 is an apocalyptic number.

91605098 is a deficient number, since it is larger than the sum of its proper divisors (57185980).

91605098 is a wasteful number, since it uses less digits than its factorization.

91605098 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271049 (or 271036 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 38.

The square root of 91605098 is about 9571.0552187311. The cubic root of 91605098 is about 450.7889009328.

The spelling of 91605098 in words is "ninety-one million, six hundred five thousand, ninety-eight".