804513839 has 2 divisors, whose sum is σ = 804513840. Its totient is φ = 804513838.

The previous prime is 804513781. The next prime is 804513859. The reversal of 804513839 is 938315408.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-804513839 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 804513796 and 804513805.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (804513859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 402256919 + 402256920.

It is an arithmetic number, because the mean of its divisors is an integer number (402256920).

Almost surely, 2^804513839 is an apocalyptic number.

804513839 is a deficient number, since it is larger than the sum of its proper divisors (1).

804513839 is an equidigital number, since it uses as much as digits as its factorization.

804513839 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 103680, while the sum is 41.

The square root of 804513839 is about 28363.9531624208. The cubic root of 804513839 is about 930.0604419807.

The spelling of 804513839 in words is "eight hundred four million, five hundred thirteen thousand, eight hundred thirty-nine".