72259439 has 4 divisors (see below), whose sum is σ = 82582224. Its totient is φ = 61936656.

The previous prime is 72259391. The next prime is 72259457. The reversal of 72259439 is 93495227.

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

It is a cyclic number.

It is not a de Polignac number, because 72259439 - 2⁸ = 72259183 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72259396 and 72259405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72259139) 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, 5161382 + ... + 5161395.

It is an arithmetic number, because the mean of its divisors is an integer number (20645556).

Almost surely, 2^72259439 is an apocalyptic number.

72259439 is a deficient number, since it is larger than the sum of its proper divisors (10322785).

72259439 is a wasteful number, since it uses less digits than its factorization.

72259439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10322784.

The product of its digits is 136080, while the sum is 41.

The square root of 72259439 is about 8500.5552171608. Note that the first 3 decimals coincide. The cubic root of 72259439 is about 416.5158460719.

The spelling of 72259439 in words is "seventy-two million, two hundred fifty-nine thousand, four hundred thirty-nine".