689112371 has 2 divisors, whose sum is σ = 689112372. Its totient is φ = 689112370.

The previous prime is 689112331. The next prime is 689112373. The reversal of 689112371 is 173211986.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-689112371 is a prime.

Together with 689112373, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_35718059 and since 689112371 and 35718059 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (689112373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344556185 + 344556186.

It is an arithmetic number, because the mean of its divisors is an integer number (344556186).

Almost surely, 2^689112371 is an apocalyptic number.

689112371 is a deficient number, since it is larger than the sum of its proper divisors (1).

689112371 is an equidigital number, since it uses as much as digits as its factorization.

689112371 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18144, while the sum is 38.

The square root of 689112371 is about 26250.9499066224. The cubic root of 689112371 is about 883.2765125746.

The spelling of 689112371 in words is "six hundred eighty-nine million, one hundred twelve thousand, three hundred seventy-one".