42321311393 has 2 divisors, whose sum is σ = 42321311394. Its totient is φ = 42321311392.

The previous prime is 42321311339. The next prime is 42321311407. The reversal of 42321311393 is 39311312324.

Together with previous prime (42321311339) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37694999104 + 4626312289 = 194152^2 + 68017^2 .

It is a cyclic number.

It is not a de Polignac number, because 42321311393 - 2¹⁸ = 42321049249 is a prime.

It is not a weakly prime, because it can be changed into another prime (42321311323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21160655696 + 21160655697.

It is an arithmetic number, because the mean of its divisors is an integer number (21160655697).

Almost surely, 2^42321311393 is an apocalyptic number.

It is an amenable number.

42321311393 is a deficient number, since it is larger than the sum of its proper divisors (1).

42321311393 is an equidigital number, since it uses as much as digits as its factorization.

42321311393 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11664, while the sum is 32.

The spelling of 42321311393 in words is "forty-two billion, three hundred twenty-one million, three hundred eleven thousand, three hundred ninety-three".