91417899 has 8 divisors (see below), whose sum is σ = 121935312. Its totient is φ = 60922880.

The previous prime is 91417849. The next prime is 91417913. The reversal of 91417899 is 99871419.

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 91417899 - 2⁸ = 91417643 is a prime.

It is not an unprimeable number, because it can be changed into a prime (91417819) 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, 10759 + ... + 17279.

It is an arithmetic number, because the mean of its divisors is an integer number (15241914).

Almost surely, 2^91417899 is an apocalyptic number.

91417899 is a deficient number, since it is larger than the sum of its proper divisors (30517413).

91417899 is a wasteful number, since it uses less digits than its factorization.

91417899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11197.

The product of its digits is 163296, while the sum is 48.

The square root of 91417899 is about 9561.2707837400. The cubic root of 91417899 is about 450.4816226203.

The spelling of 91417899 in words is "ninety-one million, four hundred seventeen thousand, eight hundred ninety-nine".