42400323073 has 2 divisors, whose sum is σ = 42400323074. Its totient is φ = 42400323072.

The previous prime is 42400323071. The next prime is 42400323109. The reversal of 42400323073 is 37032300424.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42100063489 + 300259584 = 205183^2 + 17328^2 .

It is a cyclic number.

It is not a de Polignac number, because 42400323073 - 2¹ = 42400323071 is a prime.

Together with 42400323071, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (42400323071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21200161536 + 21200161537.

It is an arithmetic number, because the mean of its divisors is an integer number (21200161537).

Almost surely, 2^42400323073 is an apocalyptic number.

It is an amenable number.

42400323073 is a deficient number, since it is larger than the sum of its proper divisors (1).

42400323073 is an equidigital number, since it uses as much as digits as its factorization.

42400323073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 28.

Adding to 42400323073 its reverse (37032300424), we get a palindrome (79432623497).

The spelling of 42400323073 in words is "forty-two billion, four hundred million, three hundred twenty-three thousand, seventy-three".