91868867 has 8 divisors (see below), whose sum is σ = 98868672. Its totient is φ = 85046400.

The previous prime is 91868849. The next prime is 91868869. The reversal of 91868867 is 76886819.

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 91868867 - 2¹⁰ = 91867843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91868869) 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, 43259 + ... + 45332.

It is an arithmetic number, because the mean of its divisors is an integer number (12358584).

Almost surely, 2^91868867 is an apocalyptic number.

91868867 is a deficient number, since it is larger than the sum of its proper divisors (6999805).

91868867 is a wasteful number, since it uses less digits than its factorization.

91868867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88669.

The product of its digits is 1161216, while the sum is 53.

The square root of 91868867 is about 9584.8248288636. The cubic root of 91868867 is about 451.2211556060.

The spelling of 91868867 in words is "ninety-one million, eight hundred sixty-eight thousand, eight hundred sixty-seven".