142219709 has 2 divisors, whose sum is σ = 142219710. Its totient is φ = 142219708.

The previous prime is 142219699. The next prime is 142219711. The reversal of 142219709 is 907912241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 121771225 + 20448484 = 11035^2 + 4522^2 .

It is a cyclic number.

It is not a de Polignac number, because 142219709 - 2¹² = 142215613 is a prime.

Together with 142219711, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142219789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71109854 + 71109855.

It is an arithmetic number, because the mean of its divisors is an integer number (71109855).

Almost surely, 2^142219709 is an apocalyptic number.

It is an amenable number.

142219709 is a deficient number, since it is larger than the sum of its proper divisors (1).

142219709 is an equidigital number, since it uses as much as digits as its factorization.

142219709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072, while the sum is 35.

The square root of 142219709 is about 11925.5905094884. The cubic root of 142219709 is about 521.9792774714.

The spelling of 142219709 in words is "one hundred forty-two million, two hundred nineteen thousand, seven hundred nine".