689470867 has 2 divisors, whose sum is σ = 689470868. Its totient is φ = 689470866.

The previous prime is 689470849. The next prime is 689470877. The reversal of 689470867 is 768074986.

689470867 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-689470867 is a prime.

It is not a weakly prime, because it can be changed into another prime (689470877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344735433 + 344735434.

It is an arithmetic number, because the mean of its divisors is an integer number (344735434).

Almost surely, 2^689470867 is an apocalyptic number.

689470867 is a deficient number, since it is larger than the sum of its proper divisors (1).

689470867 is an equidigital number, since it uses as much as digits as its factorization.

689470867 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4064256, while the sum is 55.

The square root of 689470867 is about 26257.7772669356. Note that the first 3 decimals coincide. The cubic root of 689470867 is about 883.4296546046.

The spelling of 689470867 in words is "six hundred eighty-nine million, four hundred seventy thousand, eight hundred sixty-seven".