690824786629 has 2 divisors, whose sum is σ = 690824786630. Its totient is φ = 690824786628.

The previous prime is 690824786627. The next prime is 690824786633. The reversal of 690824786629 is 926687428096.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 417193269025 + 273631517604 = 645905^2 + 523098^2 .

It is a cyclic number.

It is not a de Polignac number, because 690824786629 - 2¹ = 690824786627 is a prime.

Together with 690824786627, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (690824786621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 345412393314 + 345412393315.

It is an arithmetic number, because the mean of its divisors is an integer number (345412393315).

Almost surely, 2^690824786629 is an apocalyptic number.

It is an amenable number.

690824786629 is a deficient number, since it is larger than the sum of its proper divisors (1).

690824786629 is an equidigital number, since it uses as much as digits as its factorization.

690824786629 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 125411328, while the sum is 67.

The spelling of 690824786629 in words is "six hundred ninety billion, eight hundred twenty-four million, seven hundred eighty-six thousand, six hundred twenty-nine".