42444377 has 2 divisors, whose sum is σ = 42444378. Its totient is φ = 42444376.

The previous prime is 42444331. The next prime is 42444379. The reversal of 42444377 is 77344424.

42444377 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 can be written as a sum of positive squares in only one way, i.e., 27920656 + 14523721 = 5284^2 + 3811^2 .

It is a cyclic number.

It is not a de Polignac number, because 42444377 - 2¹⁴ = 42427993 is a prime.

Together with 42444379, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42444379) 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, 21222188 + 21222189.

It is an arithmetic number, because the mean of its divisors is an integer number (21222189).

Almost surely, 2^42444377 is an apocalyptic number.

It is an amenable number.

42444377 is a deficient number, since it is larger than the sum of its proper divisors (1).

42444377 is an equidigital number, since it uses as much as digits as its factorization.

42444377 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 75264, while the sum is 35.

The square root of 42444377 is about 6514.9349190917. The cubic root of 42444377 is about 348.8242917573.

The spelling of 42444377 in words is "forty-two million, four hundred forty-four thousand, three hundred seventy-seven".