680123135 has 16 divisors (see below), whose sum is σ = 834627456. Its totient is φ = 531810048.

The previous prime is 680123113. The next prime is 680123153. The reversal of 680123135 is 531321086.

It is a cyclic number.

It is not a de Polignac number, because 680123135 - 2⁶ = 680123071 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 680123098 and 680123107.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 236627 + ... + 239483.

It is an arithmetic number, because the mean of its divisors is an integer number (52164216).

Almost surely, 2^680123135 is an apocalyptic number.

680123135 is a deficient number, since it is larger than the sum of its proper divisors (154504321).

680123135 is a wasteful number, since it uses less digits than its factorization.

680123135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3922.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 680123135 is about 26079.1705197846. The cubic root of 680123135 is about 879.4190100145.

The spelling of 680123135 in words is "six hundred eighty million, one hundred twenty-three thousand, one hundred thirty-five".