800780797 has 2 divisors, whose sum is σ = 800780798. Its totient is φ = 800780796.

The previous prime is 800780789. The next prime is 800780833. The reversal of 800780797 is 797087008.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 624050361 + 176730436 = 24981^2 + 13294^2 .

It is a cyclic number.

It is not a de Polignac number, because 800780797 - 2³ = 800780789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (800780777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 400390398 + 400390399.

It is an arithmetic number, because the mean of its divisors is an integer number (400390399).

Almost surely, 2^800780797 is an apocalyptic number.

It is an amenable number.

800780797 is a deficient number, since it is larger than the sum of its proper divisors (1).

800780797 is an equidigital number, since it uses as much as digits as its factorization.

800780797 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 197568, while the sum is 46.

The square root of 800780797 is about 28298.0705526013. The cubic root of 800780797 is about 928.6196800748.

It can be divided in two parts, 8007 and 80797, that added together give a square (88804 = 298²).

The spelling of 800780797 in words is "eight hundred million, seven hundred eighty thousand, seven hundred ninety-seven".