646083941 has 8 divisors (see below), whose sum is σ = 654186264. Its totient is φ = 638023680.

The previous prime is 646083913. The next prime is 646083943. The reversal of 646083941 is 149380646.

It can be written as a sum of positive squares in 4 ways, for example, as 57002500 + 589081441 = 7550^2 + 24271^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-646083941 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646083943) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20981 + ... + 41621.

It is an arithmetic number, because the mean of its divisors is an integer number (81773283).

Almost surely, 2^646083941 is an apocalyptic number.

It is an amenable number.

646083941 is a deficient number, since it is larger than the sum of its proper divisors (8102323).

646083941 is a wasteful number, since it uses less digits than its factorization.

646083941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21031.

The product of its (nonzero) digits is 124416, while the sum is 41.

The square root of 646083941 is about 25418.1813078749. The cubic root of 646083941 is about 864.4959880273.

The spelling of 646083941 in words is "six hundred forty-six million, eighty-three thousand, nine hundred forty-one".