689471459 has 2 divisors, whose sum is σ = 689471460. Its totient is φ = 689471458.

The previous prime is 689471401. The next prime is 689471509. The reversal of 689471459 is 954174986.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 689471459 - 2¹⁶ = 689405923 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 689471459.

It is not a weakly prime, because it can be changed into another prime (689471359) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344735729 + 344735730.

It is an arithmetic number, because the mean of its divisors is an integer number (344735730).

Almost surely, 2^689471459 is an apocalyptic number.

689471459 is a deficient number, since it is larger than the sum of its proper divisors (1).

689471459 is an equidigital number, since it uses as much as digits as its factorization.

689471459 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2177280, while the sum is 53.

The square root of 689471459 is about 26257.7885397838. The cubic root of 689471459 is about 883.4299074508.

The spelling of 689471459 in words is "six hundred eighty-nine million, four hundred seventy-one thousand, four hundred fifty-nine".