91468721 has 8 divisors (see below), whose sum is σ = 98910720. Its totient is φ = 84255808.

The previous prime is 91468673. The next prime is 91468747. The reversal of 91468721 is 12786419.

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

It is not a de Polignac number, because 91468721 - 2¹⁰ = 91467697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91468121) 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, 56441 + ... + 58038.

It is an arithmetic number, because the mean of its divisors is an integer number (12363840).

Almost surely, 2^91468721 is an apocalyptic number.

It is an amenable number.

91468721 is a deficient number, since it is larger than the sum of its proper divisors (7441999).

91468721 is a wasteful number, since it uses less digits than its factorization.

91468721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114543.

The product of its digits is 24192, while the sum is 38.

The square root of 91468721 is about 9563.9281155810. The cubic root of 91468721 is about 450.5650859829.

The spelling of 91468721 in words is "ninety-one million, four hundred sixty-eight thousand, seven hundred twenty-one".