689895557 has 16 divisors (see below), whose sum is σ = 777047040. Its totient is φ = 607740672.

The previous prime is 689895539. The next prime is 689895589. The reversal of 689895557 is 755598986.

689895557 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 689895557 - 2²⁰ = 688846981 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 689895557.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689895257) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 140813 + ... + 145629.

It is an arithmetic number, because the mean of its divisors is an integer number (48565440).

Almost surely, 2^689895557 is an apocalyptic number.

It is an amenable number.

689895557 is a deficient number, since it is larger than the sum of its proper divisors (87151483).

689895557 is a wasteful number, since it uses less digits than its factorization.

689895557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5332.

The product of its digits is 27216000, while the sum is 62.

The square root of 689895557 is about 26265.8629593623. The cubic root of 689895557 is about 883.6110046568.

The spelling of 689895557 in words is "six hundred eighty-nine million, eight hundred ninety-five thousand, five hundred fifty-seven".