680548889 has 4 divisors (see below), whose sum is σ = 680663424. Its totient is φ = 680434356.

The previous prime is 680548849. The next prime is 680548901. The reversal of 680548889 is 988845086.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-680548889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (680548819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47837 + ... + 60410.

It is an arithmetic number, because the mean of its divisors is an integer number (170165856).

Almost surely, 2^680548889 is an apocalyptic number.

It is an amenable number.

680548889 is a deficient number, since it is larger than the sum of its proper divisors (114535).

680548889 is a wasteful number, since it uses less digits than its factorization.

680548889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114534.

The product of its (nonzero) digits is 4423680, while the sum is 56.

The square root of 680548889 is about 26087.3319640012. The cubic root of 680548889 is about 879.6024758418.

The spelling of 680548889 in words is "six hundred eighty million, five hundred forty-eight thousand, eight hundred eighty-nine".