699798861 has 18 divisors (see below), whose sum is σ = 1066826670. Its totient is φ = 441976176.

The previous prime is 699798859. The next prime is 699798881. The reversal of 699798861 is 168897996.

699798861 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 681523236 + 18275625 = 26106^2 + 4275^2 .

It is not a de Polignac number, because 699798861 - 2¹ = 699798859 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (699798811) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 104446 + ... + 110943.

Almost surely, 2^699798861 is an apocalyptic number.

It is an amenable number.

699798861 is a deficient number, since it is larger than the sum of its proper divisors (367027809).

699798861 is a wasteful number, since it uses less digits than its factorization.

699798861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215433 (or 215411 counting only the distinct ones).

The product of its digits is 11757312, while the sum is 63.

The square root of 699798861 is about 26453.7116677414. The cubic root of 699798861 is about 887.8189497277.

The spelling of 699798861 in words is "six hundred ninety-nine million, seven hundred ninety-eight thousand, eight hundred sixty-one".