680513503 has 2 divisors, whose sum is σ = 680513504. Its totient is φ = 680513502.

The previous prime is 680513501. The next prime is 680513513. The reversal of 680513503 is 305315086.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 680513503 - 2¹ = 680513501 is a prime.

Together with 680513501, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (680513501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340256751 + 340256752.

It is an arithmetic number, because the mean of its divisors is an integer number (340256752).

Almost surely, 2^680513503 is an apocalyptic number.

680513503 is a deficient number, since it is larger than the sum of its proper divisors (1).

680513503 is an equidigital number, since it uses as much as digits as its factorization.

680513503 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 680513503 is about 26086.6537332790. The cubic root of 680513503 is about 879.5872302299.

Adding to 680513503 its reverse (305315086), we get a palindrome (985828589).

The spelling of 680513503 in words is "six hundred eighty million, five hundred thirteen thousand, five hundred three".