699088009 has 4 divisors (see below), whose sum is σ = 699197716. Its totient is φ = 698978304.

The previous prime is 699088003. The next prime is 699088043. The reversal of 699088009 is 900880996.

699088009 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 64048009 + 635040000 = 8003^2 + 25200^2 .

It is a cyclic number.

It is not a de Polignac number, because 699088009 - 2⁹ = 699087497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (699088003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44664 + ... + 58249.

It is an arithmetic number, because the mean of its divisors is an integer number (174799429).

Almost surely, 2^699088009 is an apocalyptic number.

It is an amenable number.

699088009 is a deficient number, since it is larger than the sum of its proper divisors (109707).

699088009 is a wasteful number, since it uses less digits than its factorization.

699088009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109706.

The product of its (nonzero) digits is 279936, while the sum is 49.

The square root of 699088009 is about 26440.2724834673. The cubic root of 699088009 is about 887.5182339440.

The spelling of 699088009 in words is "six hundred ninety-nine million, eighty-eight thousand, nine".