800456851 has 2 divisors, whose sum is σ = 800456852. Its totient is φ = 800456850.

The previous prime is 800456843. The next prime is 800456863. The reversal of 800456851 is 158654008.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 800456851 - 2³ = 800456843 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 800456851.

It is not a weakly prime, because it can be changed into another prime (800456801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 400228425 + 400228426.

It is an arithmetic number, because the mean of its divisors is an integer number (400228426).

Almost surely, 2^800456851 is an apocalyptic number.

800456851 is a deficient number, since it is larger than the sum of its proper divisors (1).

800456851 is an equidigital number, since it uses as much as digits as its factorization.

800456851 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 38400, while the sum is 37.

The square root of 800456851 is about 28292.3461558069. The cubic root of 800456851 is about 928.4944426374.

The spelling of 800456851 in words is "eight hundred million, four hundred fifty-six thousand, eight hundred fifty-one".