42436397 has 2 divisors, whose sum is σ = 42436398. Its totient is φ = 42436396.

The previous prime is 42436343. The next prime is 42436409. The reversal of 42436397 is 79363424.

42436397 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., 41550916 + 885481 = 6446^2 + 941^2 .

It is a cyclic number.

It is not a de Polignac number, because 42436397 - 2⁶ = 42436333 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42436397.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42436327) 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, 21218198 + 21218199.

It is an arithmetic number, because the mean of its divisors is an integer number (21218199).

Almost surely, 2^42436397 is an apocalyptic number.

It is an amenable number.

42436397 is a deficient number, since it is larger than the sum of its proper divisors (1).

42436397 is an equidigital number, since it uses as much as digits as its factorization.

42436397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108864, while the sum is 38.

The square root of 42436397 is about 6514.3224513375. The cubic root of 42436397 is about 348.8024294792.

The spelling of 42436397 in words is "forty-two million, four hundred thirty-six thousand, three hundred ninety-seven".