91842817 has 4 divisors (see below), whose sum is σ = 100192176. Its totient is φ = 83493460.

The previous prime is 91842809. The next prime is 91842889. The reversal of 91842817 is 71824819.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 71824819 = 11 ⋅6529529.

It is a cyclic number.

It is not a de Polignac number, because 91842817 - 2³ = 91842809 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 91842817.

It is not an unprimeable number, because it can be changed into a prime (91842617) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4174663 + ... + 4174684.

It is an arithmetic number, because the mean of its divisors is an integer number (25048044).

Almost surely, 2^91842817 is an apocalyptic number.

It is an amenable number.

91842817 is a deficient number, since it is larger than the sum of its proper divisors (8349359).

91842817 is a wasteful number, since it uses less digits than its factorization.

91842817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8349358.

The product of its digits is 32256, while the sum is 40.

The square root of 91842817 is about 9583.4658135770. The cubic root of 91842817 is about 451.1785027005.

The spelling of 91842817 in words is "ninety-one million, eight hundred forty-two thousand, eight hundred seventeen".