680648523 has 4 divisors (see below), whose sum is σ = 907531368. Its totient is φ = 453765680.

The previous prime is 680648519. The next prime is 680648581. The reversal of 680648523 is 325846086.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 680648523 - 2² = 680648519 is a prime.

It is not an unprimeable number, because it can be changed into a prime (680648513) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 113441418 + ... + 113441423.

It is an arithmetic number, because the mean of its divisors is an integer number (226882842).

Almost surely, 2^680648523 is an apocalyptic number.

680648523 is a deficient number, since it is larger than the sum of its proper divisors (226882845).

680648523 is a wasteful number, since it uses less digits than its factorization.

680648523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226882844.

The product of its (nonzero) digits is 276480, while the sum is 42.

The square root of 680648523 is about 26089.2415182964. The cubic root of 680648523 is about 879.6453990557.

The spelling of 680648523 in words is "six hundred eighty million, six hundred forty-eight thousand, five hundred twenty-three".