801406839 has 4 divisors (see below), whose sum is σ = 1068542456. Its totient is φ = 534271224.

The previous prime is 801406811. The next prime is 801406841. The reversal of 801406839 is 938604108.

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

It is not a de Polignac number, because 801406839 - 2¹⁷ = 801275767 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 801406797 and 801406806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (801406849) 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, 133567804 + ... + 133567809.

It is an arithmetic number, because the mean of its divisors is an integer number (267135614).

Almost surely, 2^801406839 is an apocalyptic number.

801406839 is a deficient number, since it is larger than the sum of its proper divisors (267135617).

801406839 is a wasteful number, since it uses less digits than its factorization.

801406839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267135616.

The product of its (nonzero) digits is 41472, while the sum is 39.

The square root of 801406839 is about 28309.1299583721. The cubic root of 801406839 is about 928.8616120703.

The spelling of 801406839 in words is "eight hundred one million, four hundred six thousand, eight hundred thirty-nine".