641723683 has 2 divisors, whose sum is σ = 641723684. Its totient is φ = 641723682.

The previous prime is 641723669. The next prime is 641723711. The reversal of 641723683 is 386327146.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 641723683 - 2⁹ = 641723171 is a prime.

It is not a weakly prime, because it can be changed into another prime (641723623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320861841 + 320861842.

It is an arithmetic number, because the mean of its divisors is an integer number (320861842).

Almost surely, 2^641723683 is an apocalyptic number.

641723683 is a deficient number, since it is larger than the sum of its proper divisors (1).

641723683 is an equidigital number, since it uses as much as digits as its factorization.

641723683 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145152, while the sum is 40.

The square root of 641723683 is about 25332.2656507467. The cubic root of 641723683 is about 862.5468413404.

The spelling of 641723683 in words is "six hundred forty-one million, seven hundred twenty-three thousand, six hundred eighty-three".