680513501 has 2 divisors, whose sum is σ = 680513502. Its totient is φ = 680513500.

The previous prime is 680513461. The next prime is 680513503. The reversal of 680513501 is 105315086.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 477422500 + 203091001 = 21850^2 + 14251^2 .

It is a cyclic number.

It is not a de Polignac number, because 680513501 - 2¹⁴ = 680497117 is a prime.

Together with 680513503, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (680513503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340256750 + 340256751.

It is an arithmetic number, because the mean of its divisors is an integer number (340256751).

Almost surely, 2^680513501 is an apocalyptic number.

It is an amenable number.

680513501 is a deficient number, since it is larger than the sum of its proper divisors (1).

680513501 is an equidigital number, since it uses as much as digits as its factorization.

680513501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3600, while the sum is 29.

The square root of 680513501 is about 26086.6536949452. The cubic root of 680513501 is about 879.5872293682.

Adding to 680513501 its reverse (105315086), we get a palindrome (785828587).

The spelling of 680513501 in words is "six hundred eighty million, five hundred thirteen thousand, five hundred one".