91598 has 12 divisors (see below), whose sum is σ = 149328. Its totient is φ = 42120.

The previous prime is 91591. The next prime is 91621. The reversal of 91598 is 89519.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91591) 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, 203 + ... + 473.

It is an arithmetic number, because the mean of its divisors is an integer number (12444).

2⁹¹⁵⁹⁸ is an apocalyptic number.

91598 is a deficient number, since it is larger than the sum of its proper divisors (57730).

91598 is a wasteful number, since it uses less digits than its factorization.

91598 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299 (or 286 counting only the distinct ones).

The product of its digits is 3240, while the sum is 32.

The square root of 91598 is about 302.6516148974. The cubic root of 91598 is about 45.0777257541.

The spelling of 91598 in words is "ninety-one thousand, five hundred ninety-eight".