804142039 has 2 divisors, whose sum is σ = 804142040. Its totient is φ = 804142038.

The previous prime is 804142037. The next prime is 804142043. The reversal of 804142039 is 930241408.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 804142039 - 2¹ = 804142037 is a prime.

Together with 804142037, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 804142039.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (804142033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 402071019 + 402071020.

It is an arithmetic number, because the mean of its divisors is an integer number (402071020).

Almost surely, 2^804142039 is an apocalyptic number.

804142039 is a deficient number, since it is larger than the sum of its proper divisors (1).

804142039 is an equidigital number, since it uses as much as digits as its factorization.

804142039 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 804142039 is about 28357.3983115518. The cubic root of 804142039 is about 929.9171464323.

The spelling of 804142039 in words is "eight hundred four million, one hundred forty-two thousand, thirty-nine".