680626259 has 4 divisors (see below), whose sum is σ = 704096160. Its totient is φ = 657156360.

The previous prime is 680626249. The next prime is 680626279. The reversal of 680626259 is 952626086.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 952626086 = 2 ⋅476313043.

It is a cyclic number.

It is not a de Polignac number, because 680626259 - 2²⁰ = 679577683 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (680626249) 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, 11734907 + ... + 11734964.

It is an arithmetic number, because the mean of its divisors is an integer number (176024040).

Almost surely, 2^680626259 is an apocalyptic number.

680626259 is a deficient number, since it is larger than the sum of its proper divisors (23469901).

680626259 is a wasteful number, since it uses less digits than its factorization.

680626259 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23469900.

The product of its (nonzero) digits is 311040, while the sum is 44.

The square root of 680626259 is about 26088.8148255148. The cubic root of 680626259 is about 879.6358078898.

The spelling of 680626259 in words is "six hundred eighty million, six hundred twenty-six thousand, two hundred fifty-nine".