91317098 has 16 divisors (see below), whose sum is σ = 146784960. Its totient is φ = 42453696.

The previous prime is 91317091. The next prime is 91317101. The reversal of 91317098 is 89071319.

It is not an unprimeable number, because it can be changed into a prime (91317091) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13358 + ... + 19001.

It is an arithmetic number, because the mean of its divisors is an integer number (9174060).

Almost surely, 2^91317098 is an apocalyptic number.

91317098 is a deficient number, since it is larger than the sum of its proper divisors (55467862).

91317098 is a wasteful number, since it uses less digits than its factorization.

91317098 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32461.

The product of its (nonzero) digits is 13608, while the sum is 38.

The square root of 91317098 is about 9555.9980117202. The cubic root of 91317098 is about 450.3159887612.

Adding to 91317098 its sum of digits (38), we get a square (91317136 = 9556²).

The spelling of 91317098 in words is "ninety-one million, three hundred seventeen thousand, ninety-eight".