680140989 has 16 divisors (see below), whose sum is σ = 1099218240. Its totient is φ = 412206480.

The previous prime is 680140949. The next prime is 680141017. The reversal of 680140989 is 989041086.

It is not a de Polignac number, because 680140989 - 2¹² = 680136893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (680140939) 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, 1144722 + ... + 1145315.

It is an arithmetic number, because the mean of its divisors is an integer number (68701140).

Almost surely, 2^680140989 is an apocalyptic number.

It is an amenable number.

680140989 is a deficient number, since it is larger than the sum of its proper divisors (419077251).

680140989 is a wasteful number, since it uses less digits than its factorization.

680140989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2290057 (or 2290051 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 45.

The square root of 680140989 is about 26079.5128213700. The cubic root of 680140989 is about 879.4267051944.

The spelling of 680140989 in words is "six hundred eighty million, one hundred forty thousand, nine hundred eighty-nine".