646752823 has 2 divisors, whose sum is σ = 646752824. Its totient is φ = 646752822.

The previous prime is 646752797. The next prime is 646752829. The reversal of 646752823 is 328257646.

646752823 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 646752823 - 2¹⁷ = 646621751 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 646752823.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (646752829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323376411 + 323376412.

It is an arithmetic number, because the mean of its divisors is an integer number (323376412).

Almost surely, 2^646752823 is an apocalyptic number.

646752823 is a deficient number, since it is larger than the sum of its proper divisors (1).

646752823 is an equidigital number, since it uses as much as digits as its factorization.

646752823 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 483840, while the sum is 43.

The square root of 646752823 is about 25431.3354545136. The cubic root of 646752823 is about 864.7942188161.

The spelling of 646752823 in words is "six hundred forty-six million, seven hundred fifty-two thousand, eight hundred twenty-three".