689018357 has 2 divisors, whose sum is σ = 689018358. Its totient is φ = 689018356.

The previous prime is 689018353. The next prime is 689018377. The reversal of 689018357 is 753810986.

It is a happy number.

689018357 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 454499761 + 234518596 = 21319^2 + 15314^2 .

It is a cyclic number.

It is not a de Polignac number, because 689018357 - 2² = 689018353 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (689018353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344509178 + 344509179.

It is an arithmetic number, because the mean of its divisors is an integer number (344509179).

Almost surely, 2^689018357 is an apocalyptic number.

It is an amenable number.

689018357 is a deficient number, since it is larger than the sum of its proper divisors (1).

689018357 is an equidigital number, since it uses as much as digits as its factorization.

689018357 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 362880, while the sum is 47.

The square root of 689018357 is about 26249.1591674857. The cubic root of 689018357 is about 883.2363429602.

The spelling of 689018357 in words is "six hundred eighty-nine million, eighteen thousand, three hundred fifty-seven".