689734207 has 2 divisors, whose sum is σ = 689734208. Its totient is φ = 689734206.

The previous prime is 689734169. The next prime is 689734211. The reversal of 689734207 is 702437986.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 689734207 - 2¹¹ = 689732159 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (689734237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344867103 + 344867104.

It is an arithmetic number, because the mean of its divisors is an integer number (344867104).

Almost surely, 2^689734207 is an apocalyptic number.

689734207 is a deficient number, since it is larger than the sum of its proper divisors (1).

689734207 is an equidigital number, since it uses as much as digits as its factorization.

689734207 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 508032, while the sum is 46.

The square root of 689734207 is about 26262.7913025253. The cubic root of 689734207 is about 883.5421141558.

The spelling of 689734207 in words is "six hundred eighty-nine million, seven hundred thirty-four thousand, two hundred seven".