646288343 has 2 divisors, whose sum is σ = 646288344. Its totient is φ = 646288342.

The previous prime is 646288309. The next prime is 646288393. The reversal of 646288343 is 343882646.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 646288343 - 2⁸ = 646288087 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 646288294 and 646288303.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (646288393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323144171 + 323144172.

It is an arithmetic number, because the mean of its divisors is an integer number (323144172).

Almost surely, 2^646288343 is an apocalyptic number.

646288343 is a deficient number, since it is larger than the sum of its proper divisors (1).

646288343 is an equidigital number, since it uses as much as digits as its factorization.

646288343 is an evil number, because the sum of its binary digits is even.

The product of its digits is 663552, while the sum is 44.

The square root of 646288343 is about 25422.2017732532. The cubic root of 646288343 is about 864.5871454690.

The spelling of 646288343 in words is "six hundred forty-six million, two hundred eighty-eight thousand, three hundred forty-three".