42774647 has 2 divisors, whose sum is σ = 42774648. Its totient is φ = 42774646.

The previous prime is 42774593. The next prime is 42774659. The reversal of 42774647 is 74647724.

42774647 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 not a de Polignac number, because 42774647 - 2¹⁰ = 42773623 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42771647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21387323 + 21387324.

It is an arithmetic number, because the mean of its divisors is an integer number (21387324).

Almost surely, 2^42774647 is an apocalyptic number.

42774647 is a deficient number, since it is larger than the sum of its proper divisors (1).

42774647 is an equidigital number, since it uses as much as digits as its factorization.

42774647 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 263424, while the sum is 41.

The square root of 42774647 is about 6540.2329469217. The cubic root of 42774647 is about 349.7267172865.

The spelling of 42774647 in words is "forty-two million, seven hundred seventy-four thousand, six hundred forty-seven".