683645121 has 12 divisors (see below), whose sum is σ = 987891840. Its totient is φ = 455576760.

The previous prime is 683645113. The next prime is 683645147. The reversal of 683645121 is 121546386.

It is a happy number.

683645121 is a `hidden beast` number, since 6 + 8 + 3 + 645 + 1 + 2 + 1 = 666.

683645121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 683645121 - 2³ = 683645113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (683645161) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9820 + ... + 38258.

It is an arithmetic number, because the mean of its divisors is an integer number (82324320).

Almost surely, 2^683645121 is an apocalyptic number.

It is an amenable number.

683645121 is a deficient number, since it is larger than the sum of its proper divisors (304246719).

683645121 is a wasteful number, since it uses less digits than its factorization.

683645121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31116 (or 31113 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 683645121 is about 26146.6082121563. The cubic root of 683645121 is about 880.9344073498.

The spelling of 683645121 in words is "six hundred eighty-three million, six hundred forty-five thousand, one hundred twenty-one".