642683 has 2 divisors, whose sum is σ = 642684. Its totient is φ = 642682.

The previous prime is 642673. The next prime is 642701. The reversal of 642683 is 386246.

It is a weak prime.

642683 is a truncatable prime.

It is a cyclic number.

It is not a de Polignac number, because 642683 - 2⁸ = 642427 is a prime.

It is not a weakly prime, because it can be changed into another prime (642613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 321341 + 321342.

It is an arithmetic number, because the mean of its divisors is an integer number (321342).

2⁶⁴²⁶⁸³ is an apocalyptic number.

642683 is a deficient number, since it is larger than the sum of its proper divisors (1).

642683 is an equidigital number, since it uses as much as digits as its factorization.

642683 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6912, while the sum is 29.

The square root of 642683 is about 801.6751212305. The cubic root of 642683 is about 86.2976436346.

The spelling of 642683 in words is "six hundred forty-two thousand, six hundred eighty-three".