142438786493 has 2 divisors, whose sum is σ = 142438786494. Its totient is φ = 142438786492.

The previous prime is 142438786481. The next prime is 142438786549. The reversal of 142438786493 is 394687834241.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 94336208164 + 48102578329 = 307142^2 + 219323^2 .

It is a cyclic number.

It is not a de Polignac number, because 142438786493 - 2⁶ = 142438786429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142438786433) 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, 71219393246 + 71219393247.

It is an arithmetic number, because the mean of its divisors is an integer number (71219393247).

Almost surely, 2^142438786493 is an apocalyptic number.

It is an amenable number.

142438786493 is a deficient number, since it is larger than the sum of its proper divisors (1).

142438786493 is an equidigital number, since it uses as much as digits as its factorization.

142438786493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27869184, while the sum is 59.

The spelling of 142438786493 in words is "one hundred forty-two billion, four hundred thirty-eight million, seven hundred eighty-six thousand, four hundred ninety-three".