689012210987 has 2 divisors, whose sum is σ = 689012210988. Its totient is φ = 689012210986.

The previous prime is 689012210941. The next prime is 689012210989. The reversal of 689012210987 is 789012210986.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 689012210987 - 2³⁸ = 414134304043 is a prime.

Together with 689012210989, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (689012210989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344506105493 + 344506105494.

It is an arithmetic number, because the mean of its divisors is an integer number (344506105494).

Almost surely, 2^689012210987 is an apocalyptic number.

689012210987 is a deficient number, since it is larger than the sum of its proper divisors (1).

689012210987 is an equidigital number, since it uses as much as digits as its factorization.

689012210987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 870912, while the sum is 53.

Subtracting 689012210987 from its reverse (789012210986), we obtain a palindrome (99999999999).

The spelling of 689012210987 in words is "six hundred eighty-nine billion, twelve million, two hundred ten thousand, nine hundred eighty-seven".