91254817 has 8 divisors (see below), whose sum is σ = 93232296. Its totient is φ = 89286912.

The previous prime is 91254811. The next prime is 91254847. The reversal of 91254817 is 71845219.

It can be written as a sum of positive squares in 4 ways, for example, as 5803281 + 85451536 = 2409^2 + 9244^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91254817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91254811) 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, 18873 + ... + 23209.

It is an arithmetic number, because the mean of its divisors is an integer number (11654037).

Almost surely, 2^91254817 is an apocalyptic number.

It is an amenable number.

91254817 is a deficient number, since it is larger than the sum of its proper divisors (1977479).

91254817 is a wasteful number, since it uses less digits than its factorization.

91254817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4787.

The product of its digits is 20160, while the sum is 37.

The square root of 91254817 is about 9552.7387172475. The cubic root of 91254817 is about 450.2135891404.

The spelling of 91254817 in words is "ninety-one million, two hundred fifty-four thousand, eight hundred seventeen".