42910393 has 2 divisors, whose sum is σ = 42910394. Its totient is φ = 42910392.

The previous prime is 42910391. The next prime is 42910403. The reversal of 42910393 is 39301924.

42910393 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41835024 + 1075369 = 6468^2 + 1037^2 .

It is a cyclic number.

It is not a de Polignac number, because 42910393 - 2¹ = 42910391 is a prime.

Together with 42910391, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (42910391) 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, 21455196 + 21455197.

It is an arithmetic number, because the mean of its divisors is an integer number (21455197).

Almost surely, 2^42910393 is an apocalyptic number.

It is an amenable number.

42910393 is a deficient number, since it is larger than the sum of its proper divisors (1).

42910393 is an equidigital number, since it uses as much as digits as its factorization.

42910393 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5832, while the sum is 31.

The square root of 42910393 is about 6550.6024913744. The cubic root of 42910393 is about 350.0962809948.

The spelling of 42910393 in words is "forty-two million, nine hundred ten thousand, three hundred ninety-three".