42338389 has 2 divisors, whose sum is σ = 42338390. Its totient is φ = 42338388.

The previous prime is 42338357. The next prime is 42338393. The reversal of 42338389 is 98383324.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40259025 + 2079364 = 6345^2 + 1442^2 .

It is a cyclic number.

It is not a de Polignac number, because 42338389 - 2⁵ = 42338357 is a prime.

It is equal to p_2566984 and since 42338389 and 2566984 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42338339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21169194 + 21169195.

It is an arithmetic number, because the mean of its divisors is an integer number (21169195).

Almost surely, 2^42338389 is an apocalyptic number.

It is an amenable number.

42338389 is a deficient number, since it is larger than the sum of its proper divisors (1).

42338389 is an equidigital number, since it uses as much as digits as its factorization.

42338389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 124416, while the sum is 40.

The square root of 42338389 is about 6506.7956015231. The cubic root of 42338389 is about 348.5336996299.

The spelling of 42338389 in words is "forty-two million, three hundred thirty-eight thousand, three hundred eighty-nine".