42315974893 has 2 divisors, whose sum is σ = 42315974894. Its totient is φ = 42315974892.

The previous prime is 42315974861. The next prime is 42315974923. The reversal of 42315974893 is 39847951324.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 33146571844 + 9169403049 = 182062^2 + 95757^2 .

It is a cyclic number.

It is not a de Polignac number, because 42315974893 - 2⁵ = 42315974861 is a prime.

It is a super-2 number, since 2×42315974893² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42315972893) 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, 21157987446 + 21157987447.

It is an arithmetic number, because the mean of its divisors is an integer number (21157987447).

Almost surely, 2^42315974893 is an apocalyptic number.

It is an amenable number.

42315974893 is a deficient number, since it is larger than the sum of its proper divisors (1).

42315974893 is an equidigital number, since it uses as much as digits as its factorization.

42315974893 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6531840, while the sum is 55.

The spelling of 42315974893 in words is "forty-two billion, three hundred fifteen million, nine hundred seventy-four thousand, eight hundred ninety-three".