804144431 has 2 divisors, whose sum is σ = 804144432. Its totient is φ = 804144430.

The previous prime is 804144427. The next prime is 804144457. The reversal of 804144431 is 134441408.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 804144431 - 2² = 804144427 is a prime.

It is a super-2 number, since 2×804144431² = 1293296531816627522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 804144394 and 804144403.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (804144401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 402072215 + 402072216.

It is an arithmetic number, because the mean of its divisors is an integer number (402072216).

Almost surely, 2^804144431 is an apocalyptic number.

804144431 is a deficient number, since it is larger than the sum of its proper divisors (1).

804144431 is an equidigital number, since it uses as much as digits as its factorization.

804144431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6144, while the sum is 29.

The square root of 804144431 is about 28357.4404874629. The cubic root of 804144431 is about 929.9180684749.

Adding to 804144431 its reverse (134441408), we get a palindrome (938585839).

The spelling of 804144431 in words is "eight hundred four million, one hundred forty-four thousand, four hundred thirty-one".