689260209 has 16 divisors (see below), whose sum is σ = 1003181760. Its totient is φ = 417474560.

The previous prime is 689260193. The next prime is 689260211. The reversal of 689260209 is 902062986.

It is a cyclic number.

It is not a de Polignac number, because 689260209 - 2⁴ = 689260193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (689260279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56809 + ... + 67865.

It is an arithmetic number, because the mean of its divisors is an integer number (62698860).

Almost surely, 2^689260209 is an apocalyptic number.

It is an amenable number.

689260209 is a deficient number, since it is larger than the sum of its proper divisors (313921551).

689260209 is a wasteful number, since it uses less digits than its factorization.

689260209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12960.

The product of its (nonzero) digits is 93312, while the sum is 42.

The square root of 689260209 is about 26253.7656156217. The cubic root of 689260209 is about 883.3396723251.

The spelling of 689260209 in words is "six hundred eighty-nine million, two hundred sixty thousand, two hundred nine".