642367433 has 2 divisors, whose sum is σ = 642367434. Its totient is φ = 642367432.

The previous prime is 642367421. The next prime is 642367507. The reversal of 642367433 is 334763246.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 496754944 + 145612489 = 22288^2 + 12067^2 .

It is a cyclic number.

It is not a de Polignac number, because 642367433 - 2⁸ = 642367177 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (642367403) 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, 321183716 + 321183717.

It is an arithmetic number, because the mean of its divisors is an integer number (321183717).

Almost surely, 2^642367433 is an apocalyptic number.

It is an amenable number.

642367433 is a deficient number, since it is larger than the sum of its proper divisors (1).

642367433 is an equidigital number, since it uses as much as digits as its factorization.

642367433 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 217728, while the sum is 38.

The square root of 642367433 is about 25344.9685933915. The cubic root of 642367433 is about 862.8351684271.

The spelling of 642367433 in words is "six hundred forty-two million, three hundred sixty-seven thousand, four hundred thirty-three".