689314299391 has 2 divisors, whose sum is σ = 689314299392. Its totient is φ = 689314299390.

The previous prime is 689314299389. The next prime is 689314299431. The reversal of 689314299391 is 193992413986.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 689314299391 - 2¹ = 689314299389 is a prime.

Together with 689314299389, 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 (689314293391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344657149695 + 344657149696.

It is an arithmetic number, because the mean of its divisors is an integer number (344657149696).

Almost surely, 2^689314299391 is an apocalyptic number.

689314299391 is a deficient number, since it is larger than the sum of its proper divisors (1).

689314299391 is an equidigital number, since it uses as much as digits as its factorization.

689314299391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22674816, while the sum is 64.

The spelling of 689314299391 in words is "six hundred eighty-nine billion, three hundred fourteen million, two hundred ninety-nine thousand, three hundred ninety-one".