726878839 has 4 divisors (see below), whose sum is σ = 765135640. Its totient is φ = 688622040.

The previous prime is 726878833. The next prime is 726878857. The reversal of 726878839 is 938878627.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 938878627 = 47 ⋅19976141.

It is a cyclic number.

It is not a de Polignac number, because 726878839 - 2²³ = 718490231 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 (726878833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19128372 + ... + 19128409.

It is an arithmetic number, because the mean of its divisors is an integer number (191283910).

Almost surely, 2^726878839 is an apocalyptic number.

726878839 is a deficient number, since it is larger than the sum of its proper divisors (38256801).

726878839 is a wasteful number, since it uses less digits than its factorization.

726878839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38256800.

The product of its digits is 8128512, while the sum is 58.

The square root of 726878839 is about 26960.6906254272. The cubic root of 726878839 is about 899.1262462403.

The spelling of 726878839 in words is "seven hundred twenty-six million, eight hundred seventy-eight thousand, eight hundred thirty-nine".