689181839 has 12 divisors (see below), whose sum is σ = 715648440. Its totient is φ = 663663840.

The previous prime is 689181827. The next prime is 689181881. The reversal of 689181839 is 938181986.

It is not a de Polignac number, because 689181839 - 2²⁰ = 688133263 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689181809) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 412097 + ... + 413765.

It is an arithmetic number, because the mean of its divisors is an integer number (59637370).

Almost surely, 2^689181839 is an apocalyptic number.

689181839 is a deficient number, since it is larger than the sum of its proper divisors (26466601).

689181839 is a wasteful number, since it uses less digits than its factorization.

689181839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2218 (or 2189 counting only the distinct ones).

The product of its digits is 746496, while the sum is 53.

The square root of 689181839 is about 26252.2730253972. The cubic root of 689181839 is about 883.3061920065.

The spelling of 689181839 in words is "six hundred eighty-nine million, one hundred eighty-one thousand, eight hundred thirty-nine".