804043979 has 2 divisors, whose sum is σ = 804043980. Its totient is φ = 804043978.

The previous prime is 804043963. The next prime is 804043997. The reversal of 804043979 is 979340408.

Together with next prime (804043997) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 804043979 - 2⁴ = 804043963 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (804043949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 402021989 + 402021990.

It is an arithmetic number, because the mean of its divisors is an integer number (402021990).

Almost surely, 2^804043979 is an apocalyptic number.

804043979 is a deficient number, since it is larger than the sum of its proper divisors (1).

804043979 is an equidigital number, since it uses as much as digits as its factorization.

804043979 is an evil number, because the sum of its binary digits is even.

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

The square root of 804043979 is about 28355.6692567818. The cubic root of 804043979 is about 929.8793457380.

The spelling of 804043979 in words is "eight hundred four million, forty-three thousand, nine hundred seventy-nine".