42243319973 has 2 divisors, whose sum is σ = 42243319974. Its totient is φ = 42243319972.

The previous prime is 42243319939. The next prime is 42243319999. The reversal of 42243319973 is 37991334224.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34757263489 + 7486056484 = 186433^2 + 86522^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42243319973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42243319373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21121659986 + 21121659987.

It is an arithmetic number, because the mean of its divisors is an integer number (21121659987).

Almost surely, 2^42243319973 is an apocalyptic number.

It is an amenable number.

42243319973 is a deficient number, since it is larger than the sum of its proper divisors (1).

42243319973 is an equidigital number, since it uses as much as digits as its factorization.

42243319973 is an evil number, because the sum of its binary digits is even.

The product of its digits is 979776, while the sum is 47.

The spelling of 42243319973 in words is "forty-two billion, two hundred forty-three million, three hundred nineteen thousand, nine hundred seventy-three".