91225798 has 8 divisors (see below), whose sum is σ = 138487608. Its totient is φ = 45063264.

The previous prime is 91225787. The next prime is 91225817. The reversal of 91225798 is 89752219.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 274611 + ... + 274942.

It is an arithmetic number, because the mean of its divisors is an integer number (17310951).

Almost surely, 2^91225798 is an apocalyptic number.

91225798 is a deficient number, since it is larger than the sum of its proper divisors (47261810).

91225798 is a wasteful number, since it uses less digits than its factorization.

91225798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 549638.

The product of its digits is 90720, while the sum is 43.

The square root of 91225798 is about 9551.2197126859. The cubic root of 91225798 is about 450.1658614928.

The spelling of 91225798 in words is "ninety-one million, two hundred twenty-five thousand, seven hundred ninety-eight".