642382067 has 2 divisors, whose sum is σ = 642382068. Its totient is φ = 642382066.

The previous prime is 642382021. The next prime is 642382073. The reversal of 642382067 is 760283246.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 642382067 - 2²⁰ = 641333491 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 642382067.

It is not a weakly prime, because it can be changed into another prime (642382967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 321191033 + 321191034.

It is an arithmetic number, because the mean of its divisors is an integer number (321191034).

Almost surely, 2^642382067 is an apocalyptic number.

642382067 is a deficient number, since it is larger than the sum of its proper divisors (1).

642382067 is an equidigital number, since it uses as much as digits as its factorization.

642382067 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96768, while the sum is 38.

The square root of 642382067 is about 25345.2572881003. The cubic root of 642382067 is about 862.8417205618.

The spelling of 642382067 in words is "six hundred forty-two million, three hundred eighty-two thousand, sixty-seven".