726820807 has 4 divisors (see below), whose sum is σ = 728738920. Its totient is φ = 724902696.

The previous prime is 726820799. The next prime is 726820841. The reversal of 726820807 is 708028627.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 708028627 = 6833 ⋅103619.

It is a cyclic number.

It is not a de Polignac number, because 726820807 - 2³ = 726820799 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 726820807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (726820847) 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, 958488 + ... + 959245.

It is an arithmetic number, because the mean of its divisors is an integer number (182184730).

Almost surely, 2^726820807 is an apocalyptic number.

726820807 is a deficient number, since it is larger than the sum of its proper divisors (1918113).

726820807 is a wasteful number, since it uses less digits than its factorization.

726820807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1918112.

The product of its (nonzero) digits is 75264, while the sum is 40.

The square root of 726820807 is about 26959.6143703874. The cubic root of 726820807 is about 899.1023176843.

The spelling of 726820807 in words is "seven hundred twenty-six million, eight hundred twenty thousand, eight hundred seven".