91225717 has 8 divisors (see below), whose sum is σ = 99614592. Its totient is φ = 82852800.

The previous prime is 91225709. The next prime is 91225727. The reversal of 91225717 is 71752219.

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

It is a cyclic number.

It is not a de Polignac number, because 91225717 - 2³ = 91225709 is a prime.

It is a super-3 number, since 3×91225717³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91225727) 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, 10173 + ... + 16909.

It is an arithmetic number, because the mean of its divisors is an integer number (12451824).

Almost surely, 2^91225717 is an apocalyptic number.

It is an amenable number.

91225717 is a deficient number, since it is larger than the sum of its proper divisors (8388875).

91225717 is a wasteful number, since it uses less digits than its factorization.

91225717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7979.

The product of its digits is 8820, while the sum is 34.

The square root of 91225717 is about 9551.2154723888. The cubic root of 91225717 is about 450.1657282577.

The spelling of 91225717 in words is "ninety-one million, two hundred twenty-five thousand, seven hundred seventeen".