804043997 has 2 divisors, whose sum is σ = 804043998. Its totient is φ = 804043996.

The previous prime is 804043979. The next prime is 804044011. The reversal of 804043997 is 799340408.

Together with previous prime (804043979) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 655667236 + 148376761 = 25606^2 + 12181^2 .

It is a cyclic number.

It is not a de Polignac number, because 804043997 - 2⁸ = 804043741 is a prime.

It is a super-2 number, since 2×804043997² = 1292973498223472018, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (804043697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 402021998 + 402021999.

It is an arithmetic number, because the mean of its divisors is an integer number (402021999).

Almost surely, 2^804043997 is an apocalyptic number.

It is an amenable number.

804043997 is a deficient number, since it is larger than the sum of its proper divisors (1).

804043997 is an equidigital number, since it uses as much as digits as its factorization.

804043997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 217728, while the sum is 44.

The square root of 804043997 is about 28355.6695741786. The cubic root of 804043997 is about 929.8793526770.

The spelling of 804043997 in words is "eight hundred four million, forty-three thousand, nine hundred ninety-seven".