642279119 has 2 divisors, whose sum is σ = 642279120. Its totient is φ = 642279118.

The previous prime is 642279083. The next prime is 642279167. The reversal of 642279119 is 911972246.

642279119 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 642279119 - 2²⁰ = 641230543 is a prime.

It is a super-2 number, since 2×642279119² = 825044933406832322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (642279199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 321139559 + 321139560.

It is an arithmetic number, because the mean of its divisors is an integer number (321139560).

Almost surely, 2^642279119 is an apocalyptic number.

642279119 is a deficient number, since it is larger than the sum of its proper divisors (1).

642279119 is an equidigital number, since it uses as much as digits as its factorization.

642279119 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54432, while the sum is 41.

The square root of 642279119 is about 25343.2262942191. The cubic root of 642279119 is about 862.7956251618.

The spelling of 642279119 in words is "six hundred forty-two million, two hundred seventy-nine thousand, one hundred nineteen".