7272189 has 6 divisors (see below), whose sum is σ = 10504286. Its totient is φ = 4848120.

The previous prime is 7272179. The next prime is 7272191. The reversal of 7272189 is 9812727.

It can be written as a sum of positive squares in only one way, i.e., 4549689 + 2722500 = 2133^2 + 1650^2 .

It is not a de Polignac number, because 7272189 - 2⁴ = 7272173 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7272119) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 404002 + ... + 404019.

Almost surely, 2^7272189 is an apocalyptic number.

It is an amenable number.

7272189 is a deficient number, since it is larger than the sum of its proper divisors (3232097).

7272189 is a wasteful number, since it uses less digits than its factorization.

7272189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 808027 (or 808024 counting only the distinct ones).

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

The square root of 7272189 is about 2696.6996495717. The cubic root of 7272189 is about 193.7410812405.

It can be divided in two parts, 727 and 2189, that added together give a square (2916 = 54²).

The spelling of 7272189 in words is "seven million, two hundred seventy-two thousand, one hundred eighty-nine".