689696593249 has 2 divisors, whose sum is σ = 689696593250. Its totient is φ = 689696593248.

The previous prime is 689696593237. The next prime is 689696593277. The reversal of 689696593249 is 942395696986.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 689273550625 + 423042624 = 830225^2 + 20568^2 .

It is a cyclic number.

It is not a de Polignac number, because 689696593249 - 2⁷ = 689696593121 is a prime.

It is not a weakly prime, because it can be changed into another prime (689696593349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344848296624 + 344848296625.

It is an arithmetic number, because the mean of its divisors is an integer number (344848296625).

Almost surely, 2^689696593249 is an apocalyptic number.

It is an amenable number.

689696593249 is a deficient number, since it is larger than the sum of its proper divisors (1).

689696593249 is an equidigital number, since it uses as much as digits as its factorization.

689696593249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1360488960, while the sum is 76.

The spelling of 689696593249 in words is "six hundred eighty-nine billion, six hundred ninety-six million, five hundred ninety-three thousand, two hundred forty-nine".