689856367 has 2 divisors, whose sum is σ = 689856368. Its totient is φ = 689856366.

The previous prime is 689856359. The next prime is 689856397. The reversal of 689856367 is 763658986.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 689856367 - 2³ = 689856359 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (689856397) 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, 344928183 + 344928184.

It is an arithmetic number, because the mean of its divisors is an integer number (344928184).

Almost surely, 2^689856367 is an apocalyptic number.

689856367 is a deficient number, since it is larger than the sum of its proper divisors (1).

689856367 is an equidigital number, since it uses as much as digits as its factorization.

689856367 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13063680, while the sum is 58.

The square root of 689856367 is about 26265.1169234024. The cubic root of 689856367 is about 883.5942729594.

The spelling of 689856367 in words is "six hundred eighty-nine million, eight hundred fifty-six thousand, three hundred sixty-seven".