689168371 has 2 divisors, whose sum is σ = 689168372. Its totient is φ = 689168370.

The previous prime is 689168369. The next prime is 689168377. The reversal of 689168371 is 173861986.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 689168371 - 2¹ = 689168369 is a prime.

Together with 689168369, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (689168377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344584185 + 344584186.

It is an arithmetic number, because the mean of its divisors is an integer number (344584186).

Almost surely, 2^689168371 is an apocalyptic number.

689168371 is a deficient number, since it is larger than the sum of its proper divisors (1).

689168371 is an equidigital number, since it uses as much as digits as its factorization.

689168371 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 435456, while the sum is 49.

The square root of 689168371 is about 26252.0165130224. The cubic root of 689168371 is about 883.3004381089.

The spelling of 689168371 in words is "six hundred eighty-nine million, one hundred sixty-eight thousand, three hundred seventy-one".