91668083 has 4 divisors (see below), whose sum is σ = 98719488. Its totient is φ = 84616680.

The previous prime is 91668079. The next prime is 91668089. The reversal of 91668083 is 38086619.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 91668083 - 2² = 91668079 is a prime.

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 91668083.

It is not an unprimeable number, because it can be changed into a prime (91668089) 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, 3525683 + ... + 3525708.

It is an arithmetic number, because the mean of its divisors is an integer number (24679872).

Almost surely, 2^91668083 is an apocalyptic number.

91668083 is a deficient number, since it is larger than the sum of its proper divisors (7051405).

91668083 is a wasteful number, since it uses less digits than its factorization.

91668083 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7051404.

The product of its (nonzero) digits is 62208, while the sum is 41.

The square root of 91668083 is about 9574.3450428737. The cubic root of 91668083 is about 450.8921937067.

The spelling of 91668083 in words is "ninety-one million, six hundred sixty-eight thousand, eighty-three".