800099977 has 2 divisors, whose sum is σ = 800099978. Its totient is φ = 800099976.

The previous prime is 800099969. The next prime is 800099981. The reversal of 800099977 is 779990008.

800099977 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 567201856 + 232898121 = 23816^2 + 15261^2 .

It is a cyclic number.

It is not a de Polignac number, because 800099977 - 2³ = 800099969 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 800099977.

It is not a weakly prime, because it can be changed into another prime (800099947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 400049988 + 400049989.

It is an arithmetic number, because the mean of its divisors is an integer number (400049989).

Almost surely, 2^800099977 is an apocalyptic number.

It is an amenable number.

800099977 is a deficient number, since it is larger than the sum of its proper divisors (1).

800099977 is an equidigital number, since it uses as much as digits as its factorization.

800099977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 285768, while the sum is 49.

The square root of 800099977 is about 28286.0385526146. The cubic root of 800099977 is about 928.3564361223.

The spelling of 800099977 in words is "eight hundred million, ninety-nine thousand, nine hundred seventy-seven".