9722187 has 12 divisors (see below), whose sum is σ = 14563640. Its totient is φ = 6481296.

The previous prime is 9722179. The next prime is 9722191. The reversal of 9722187 is 7812279.

It is not a de Polignac number, because 9722187 - 2³ = 9722179 is a prime.

It is a Duffinian number.

9722187 is a modest number, since divided by 2187 gives 972 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9722107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19762 + ... + 20247.

Almost surely, 2^9722187 is an apocalyptic number.

9722187 is a deficient number, since it is larger than the sum of its proper divisors (4841453).

9722187 is an equidigital number, since it uses as much as digits as its factorization.

9722187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40024 (or 40012 counting only the distinct ones).

The product of its digits is 14112, while the sum is 36.

The square root of 9722187 is about 3118.0421741856. The cubic root of 9722187 is about 213.4296030890.

It can be divided in two parts, 972 and 2187, that multiplied together give a square (2125764 = 1458²).

The spelling of 9722187 in words is "nine million, seven hundred twenty-two thousand, one hundred eighty-seven".