642384011 has 2 divisors, whose sum is σ = 642384012. Its totient is φ = 642384010.

The previous prime is 642383999. The next prime is 642384031. The reversal of 642384011 is 110483246.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-642384011 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (642384031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 321192005 + 321192006.

It is an arithmetic number, because the mean of its divisors is an integer number (321192006).

Almost surely, 2^642384011 is an apocalyptic number.

642384011 is a deficient number, since it is larger than the sum of its proper divisors (1).

642384011 is an equidigital number, since it uses as much as digits as its factorization.

642384011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 642384011 is about 25345.2956384415. The cubic root of 642384011 is about 862.8425909486.

The spelling of 642384011 in words is "six hundred forty-two million, three hundred eighty-four thousand, eleven".