800390959 has 2 divisors, whose sum is σ = 800390960. Its totient is φ = 800390958.

The previous prime is 800390951. The next prime is 800390977. The reversal of 800390959 is 959093008.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 800390959 - 2³ = 800390951 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (800390951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 400195479 + 400195480.

It is an arithmetic number, because the mean of its divisors is an integer number (400195480).

Almost surely, 2^800390959 is an apocalyptic number.

800390959 is a deficient number, since it is larger than the sum of its proper divisors (1).

800390959 is an equidigital number, since it uses as much as digits as its factorization.

800390959 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 87480, while the sum is 43.

The square root of 800390959 is about 28291.1816472907. The cubic root of 800390959 is about 928.4689646725.

The spelling of 800390959 in words is "eight hundred million, three hundred ninety thousand, nine hundred fifty-nine".