643046683 has 2 divisors, whose sum is σ = 643046684. Its totient is φ = 643046682.

The previous prime is 643046633. The next prime is 643046687. The reversal of 643046683 is 386640346.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 643046683 - 2¹³ = 643038491 is a prime.

It is not a weakly prime, because it can be changed into another prime (643046687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 321523341 + 321523342.

It is an arithmetic number, because the mean of its divisors is an integer number (321523342).

Almost surely, 2^643046683 is an apocalyptic number.

643046683 is a deficient number, since it is larger than the sum of its proper divisors (1).

643046683 is an equidigital number, since it uses as much as digits as its factorization.

643046683 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 248832, while the sum is 40.

The square root of 643046683 is about 25358.3651484081. The cubic root of 643046683 is about 863.1391867101.

The spelling of 643046683 in words is "six hundred forty-three million, forty-six thousand, six hundred eighty-three".