699089680669 has 2 divisors, whose sum is σ = 699089680670. Its totient is φ = 699089680668.

The previous prime is 699089680643. The next prime is 699089680673. The reversal of 699089680669 is 966086980996.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 541688640025 + 157401040644 = 735995^2 + 396738^2 .

It is a cyclic number.

It is not a de Polignac number, because 699089680669 - 2³⁵ = 664729942301 is a prime.

It is a super-2 number, since 2×699089680669² (a number of 24 digits) contains 22 as substring.

699089680669 is a strobogrammatic number because it is the same when read upside-down.

It is a junction number, because it is equal to n+sod(n) for n = 699089680595 and 699089680604.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (699089680369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 349544840334 + 349544840335.

It is an arithmetic number, because the mean of its divisors is an integer number (349544840335).

Almost surely, 2^699089680669 is an apocalyptic number.

It is an amenable number.

699089680669 is a deficient number, since it is larger than the sum of its proper divisors (1).

699089680669 is an equidigital number, since it uses as much as digits as its factorization.

699089680669 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 544195584, while the sum is 76.

The spelling of 699089680669 in words is "six hundred ninety-nine billion, eighty-nine million, six hundred eighty thousand, six hundred sixty-nine".