42054950939 has 2 divisors, whose sum is σ = 42054950940. Its totient is φ = 42054950938.

The previous prime is 42054950893. The next prime is 42054950947. The reversal of 42054950939 is 93905945024.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42054950939 is a prime.

It is not a weakly prime, because it can be changed into another prime (42054950339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21027475469 + 21027475470.

It is an arithmetic number, because the mean of its divisors is an integer number (21027475470).

Almost surely, 2^42054950939 is an apocalyptic number.

42054950939 is a deficient number, since it is larger than the sum of its proper divisors (1).

42054950939 is an equidigital number, since it uses as much as digits as its factorization.

42054950939 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1749600, while the sum is 50.

The spelling of 42054950939 in words is "forty-two billion, fifty-four million, nine hundred fifty thousand, nine hundred thirty-nine".