689095590893 has 2 divisors, whose sum is σ = 689095590894. Its totient is φ = 689095590892.

The previous prime is 689095590877. The next prime is 689095590919. The reversal of 689095590893 is 398095590986.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 663643217449 + 25452373444 = 814643^2 + 159538^2 .

It is a cyclic number.

It is not a de Polignac number, because 689095590893 - 2⁴ = 689095590877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (689095590823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344547795446 + 344547795447.

It is an arithmetic number, because the mean of its divisors is an integer number (344547795447).

Almost surely, 2^689095590893 is an apocalyptic number.

It is an amenable number.

689095590893 is a deficient number, since it is larger than the sum of its proper divisors (1).

689095590893 is an equidigital number, since it uses as much as digits as its factorization.

689095590893 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 188956800, while the sum is 71.

The spelling of 689095590893 in words is "six hundred eighty-nine billion, ninety-five million, five hundred ninety thousand, eight hundred ninety-three".