72323389 has 8 divisors (see below), whose sum is σ = 76708728. Its totient is φ = 67952640.

The previous prime is 72323387. The next prime is 72323411. The reversal of 72323389 is 98332327.

It can be written as a sum of positive squares in 4 ways, for example, as 13264164 + 59059225 = 3642^2 + 7685^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 72323389 - 2¹ = 72323387 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 (72323387) 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, 7579 + ... + 14215.

It is an arithmetic number, because the mean of its divisors is an integer number (9588591).

Almost surely, 2^72323389 is an apocalyptic number.

It is an amenable number.

72323389 is a deficient number, since it is larger than the sum of its proper divisors (4385339).

72323389 is a wasteful number, since it uses less digits than its factorization.

72323389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7295.

The product of its digits is 54432, while the sum is 37.

The square root of 72323389 is about 8504.3159042924. The cubic root of 72323389 is about 416.6386827784.

The spelling of 72323389 in words is "seventy-two million, three hundred twenty-three thousand, three hundred eighty-nine".