689883055049 has 2 divisors, whose sum is σ = 689883055050. Its totient is φ = 689883055048.

The previous prime is 689883055039. The next prime is 689883055061. The reversal of 689883055049 is 940550388986.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 677008068025 + 12874987024 = 822805^2 + 113468^2 .

It is a cyclic number.

It is not a de Polignac number, because 689883055049 - 2⁸ = 689883054793 is a prime.

It is not a weakly prime, because it can be changed into another prime (689883055039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344941527524 + 344941527525.

It is an arithmetic number, because the mean of its divisors is an integer number (344941527525).

Almost surely, 2^689883055049 is an apocalyptic number.

It is an amenable number.

689883055049 is a deficient number, since it is larger than the sum of its proper divisors (1).

689883055049 is an equidigital number, since it uses as much as digits as its factorization.

689883055049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 74649600, while the sum is 65.

The spelling of 689883055049 in words is "six hundred eighty-nine billion, eight hundred eighty-three million, fifty-five thousand, forty-nine".