42774773939 has 2 divisors, whose sum is σ = 42774773940. Its totient is φ = 42774773938.

The previous prime is 42774773903. The next prime is 42774773959. The reversal of 42774773939 is 93937747724.

42774773939 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42774773939 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (42774773959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21387386969 + 21387386970.

It is an arithmetic number, because the mean of its divisors is an integer number (21387386970).

Almost surely, 2^42774773939 is an apocalyptic number.

42774773939 is a deficient number, since it is larger than the sum of its proper divisors (1).

42774773939 is an equidigital number, since it uses as much as digits as its factorization.

42774773939 is an evil number, because the sum of its binary digits is even.

The product of its digits is 56010528, while the sum is 62.

The spelling of 42774773939 in words is "forty-two billion, seven hundred seventy-four million, seven hundred seventy-three thousand, nine hundred thirty-nine".