680232913 has 2 divisors, whose sum is σ = 680232914. Its totient is φ = 680232912.

The previous prime is 680232911. The next prime is 680232989. The reversal of 680232913 is 319232086.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 362217024 + 318015889 = 19032^2 + 17833^2 .

It is a cyclic number.

It is not a de Polignac number, because 680232913 - 2¹ = 680232911 is a prime.

Together with 680232911, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (680232911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340116456 + 340116457.

It is an arithmetic number, because the mean of its divisors is an integer number (340116457).

Almost surely, 2^680232913 is an apocalyptic number.

It is an amenable number.

680232913 is a deficient number, since it is larger than the sum of its proper divisors (1).

680232913 is an equidigital number, since it uses as much as digits as its factorization.

680232913 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 680232913 is about 26081.2751413730. The cubic root of 680232913 is about 879.4663228522.

Adding to 680232913 its reverse (319232086), we get a palindrome (999464999).

The spelling of 680232913 in words is "six hundred eighty million, two hundred thirty-two thousand, nine hundred thirteen".