91098764 has 6 divisors (see below), whose sum is σ = 159422844. Its totient is φ = 45549380.

The previous prime is 91098731. The next prime is 91098781. The reversal of 91098764 is 46789019.

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 as a sum of consecutive naturals, namely, 11387342 + ... + 11387349.

It is an arithmetic number, because the mean of its divisors is an integer number (26570474).

Almost surely, 2^91098764 is an apocalyptic number.

It is an amenable number.

91098764 is a deficient number, since it is larger than the sum of its proper divisors (68324080).

91098764 is a wasteful number, since it uses less digits than its factorization.

91098764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22774695 (or 22774693 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 44.

The square root of 91098764 is about 9544.5672505358. The cubic root of 91098764 is about 449.9568090234.

The spelling of 91098764 in words is "ninety-one million, ninety-eight thousand, seven hundred sixty-four".