809465039 has 2 divisors, whose sum is σ = 809465040. Its totient is φ = 809465038.

The previous prime is 809465011. The next prime is 809465071. The reversal of 809465039 is 930564908.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-809465039 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (809465089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 404732519 + 404732520.

It is an arithmetic number, because the mean of its divisors is an integer number (404732520).

Almost surely, 2^809465039 is an apocalyptic number.

809465039 is a deficient number, since it is larger than the sum of its proper divisors (1).

809465039 is an equidigital number, since it uses as much as digits as its factorization.

809465039 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 233280, while the sum is 44.

The square root of 809465039 is about 28451.0990824608. The cubic root of 809465039 is about 931.9644907634.

The spelling of 809465039 in words is "eight hundred nine million, four hundred sixty-five thousand, thirty-nine".