42788351393 has 2 divisors, whose sum is σ = 42788351394. Its totient is φ = 42788351392.

The previous prime is 42788351387. The next prime is 42788351423. The reversal of 42788351393 is 39315388724.

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., 38703479824 + 4084871569 = 196732^2 + 63913^2 .

It is a cyclic number.

It is not a de Polignac number, because 42788351393 - 2¹⁰ = 42788350369 is a prime.

It is not a weakly prime, because it can be changed into another prime (42788351383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21394175696 + 21394175697.

It is an arithmetic number, because the mean of its divisors is an integer number (21394175697).

Almost surely, 2^42788351393 is an apocalyptic number.

It is an amenable number.

42788351393 is a deficient number, since it is larger than the sum of its proper divisors (1).

42788351393 is an equidigital number, since it uses as much as digits as its factorization.

42788351393 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4354560, while the sum is 53.

The spelling of 42788351393 in words is "forty-two billion, seven hundred eighty-eight million, three hundred fifty-one thousand, three hundred ninety-three".