72293189 has 4 divisors (see below), whose sum is σ = 72316140. Its totient is φ = 72270240.

The previous prime is 72293183. The next prime is 72293237. The reversal of 72293189 is 98139227.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 98139227 = 1051 ⋅93377.

It can be written as a sum of positive squares in 2 ways, for example, as 57532225 + 14760964 = 7585^2 + 3842^2 .

It is a cyclic number.

It is not a de Polignac number, because 72293189 - 2¹⁶ = 72227653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72293183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5822 + ... + 13359.

It is an arithmetic number, because the mean of its divisors is an integer number (18079035).

Almost surely, 2^72293189 is an apocalyptic number.

It is an amenable number.

72293189 is a deficient number, since it is larger than the sum of its proper divisors (22951).

72293189 is a wasteful number, since it uses less digits than its factorization.

72293189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22950.

The product of its digits is 54432, while the sum is 41.

The square root of 72293189 is about 8502.5401498611. The cubic root of 72293189 is about 416.5806829153.

The spelling of 72293189 in words is "seventy-two million, two hundred ninety-three thousand, one hundred eighty-nine".