9722891 has 4 divisors (see below), whose sum is σ = 9817392. Its totient is φ = 9628392.

The previous prime is 9722887. The next prime is 9722893. The reversal of 9722891 is 1982279.

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 9722891 - 2² = 9722887 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9722893) 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, 47096 + ... + 47301.

It is an arithmetic number, because the mean of its divisors is an integer number (2454348).

Almost surely, 2^9722891 is an apocalyptic number.

9722891 is a deficient number, since it is larger than the sum of its proper divisors (94501).

9722891 is a wasteful number, since it uses less digits than its factorization.

9722891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94500.

The product of its digits is 18144, while the sum is 38.

The square root of 9722891 is about 3118.1550634951. The cubic root of 9722891 is about 213.4347545641.

The spelling of 9722891 in words is "nine million, seven hundred twenty-two thousand, eight hundred ninety-one".