72839089 has 4 divisors (see below), whose sum is σ = 73102324. Its totient is φ = 72575856.

The previous prime is 72839077. The next prime is 72839093. The reversal of 72839089 is 98093827.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4032064 + 68807025 = 2008^2 + 8295^2 .

It is a cyclic number.

It is not a de Polignac number, because 72839089 - 2¹¹ = 72837041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72839029) 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, 131202 + ... + 131755.

It is an arithmetic number, because the mean of its divisors is an integer number (18275581).

Almost surely, 2^72839089 is an apocalyptic number.

It is an amenable number.

72839089 is a deficient number, since it is larger than the sum of its proper divisors (263235).

72839089 is a wasteful number, since it uses less digits than its factorization.

72839089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263234.

The product of its (nonzero) digits is 217728, while the sum is 46.

The square root of 72839089 is about 8534.5819464107. The cubic root of 72839089 is about 417.6266153558.

The spelling of 72839089 in words is "seventy-two million, eight hundred thirty-nine thousand, eighty-nine".