689901071 has 2 divisors, whose sum is σ = 689901072. Its totient is φ = 689901070.

The previous prime is 689901061. The next prime is 689901119. The reversal of 689901071 is 170109986.

It is a happy number.

689901071 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 689901071 - 2²⁶ = 622792207 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (689901061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344950535 + 344950536.

It is an arithmetic number, because the mean of its divisors is an integer number (344950536).

Almost surely, 2^689901071 is an apocalyptic number.

689901071 is a deficient number, since it is larger than the sum of its proper divisors (1).

689901071 is an equidigital number, since it uses as much as digits as its factorization.

689901071 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27216, while the sum is 41.

The square root of 689901071 is about 26265.9679242932. The cubic root of 689901071 is about 883.6133587416.

The spelling of 689901071 in words is "six hundred eighty-nine million, nine hundred one thousand, seventy-one".