804816539 has 2 divisors, whose sum is σ = 804816540. Its totient is φ = 804816538.

The previous prime is 804816521. The next prime is 804816553. The reversal of 804816539 is 935618408.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 804816539 - 2⁸ = 804816283 is a prime.

It is a super-2 number, since 2×804816539² = 1295459322895877042, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 804816539.

It is not a weakly prime, because it can be changed into another prime (804816139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 402408269 + 402408270.

It is an arithmetic number, because the mean of its divisors is an integer number (402408270).

Almost surely, 2^804816539 is an apocalyptic number.

804816539 is a deficient number, since it is larger than the sum of its proper divisors (1).

804816539 is an equidigital number, since it uses as much as digits as its factorization.

804816539 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 207360, while the sum is 44.

The square root of 804816539 is about 28369.2886586886. The cubic root of 804816539 is about 930.1770730776.

The spelling of 804816539 in words is "eight hundred four million, eight hundred sixteen thousand, five hundred thirty-nine".