680540023 has 4 divisors (see below), whose sum is σ = 680595048. Its totient is φ = 680485000.

The previous prime is 680539997. The next prime is 680540057. The reversal of 680540023 is 320045086.

680540023 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 680540023 - 2¹⁷ = 680408951 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 680539973 and 680540000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (680540093) 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, 648 + ... + 36898.

It is an arithmetic number, because the mean of its divisors is an integer number (170148762).

Almost surely, 2^680540023 is an apocalyptic number.

680540023 is a deficient number, since it is larger than the sum of its proper divisors (55025).

680540023 is a wasteful number, since it uses less digits than its factorization.

680540023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55024.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 680540023 is about 26087.1620342267. The cubic root of 680540023 is about 879.5986560871.

The spelling of 680540023 in words is "six hundred eighty million, five hundred forty thousand, twenty-three".