42239369 has 2 divisors, whose sum is σ = 42239370. Its totient is φ = 42239368.

The previous prime is 42239363. The next prime is 42239383. The reversal of 42239369 is 96393224.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37063744 + 5175625 = 6088^2 + 2275^2 .

It is a cyclic number.

It is not a de Polignac number, because 42239369 - 2²⁴ = 25462153 is a prime.

It is a super-2 number, since 2×42239369² = 3568328587036322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42239363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21119684 + 21119685.

It is an arithmetic number, because the mean of its divisors is an integer number (21119685).

Almost surely, 2^42239369 is an apocalyptic number.

It is an amenable number.

42239369 is a deficient number, since it is larger than the sum of its proper divisors (1).

42239369 is an equidigital number, since it uses as much as digits as its factorization.

42239369 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69984, while the sum is 38.

The square root of 42239369 is about 6499.1821793207. The cubic root of 42239369 is about 348.2617734663.

The spelling of 42239369 in words is "forty-two million, two hundred thirty-nine thousand, three hundred sixty-nine".