42388637 has 2 divisors, whose sum is σ = 42388638. Its totient is φ = 42388636.

The previous prime is 42388613. The next prime is 42388649. The reversal of 42388637 is 73688324.

42388637 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., 33304441 + 9084196 = 5771^2 + 3014^2 .

It is a cyclic number.

It is not a de Polignac number, because 42388637 - 2⁶ = 42388573 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42388594 and 42388603.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42388037) 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, 21194318 + 21194319.

It is an arithmetic number, because the mean of its divisors is an integer number (21194319).

Almost surely, 2^42388637 is an apocalyptic number.

It is an amenable number.

42388637 is a deficient number, since it is larger than the sum of its proper divisors (1).

42388637 is an equidigital number, since it uses as much as digits as its factorization.

42388637 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 193536, while the sum is 41.

The square root of 42388637 is about 6510.6556505470. The cubic root of 42388637 is about 348.6715272454.

The spelling of 42388637 in words is "forty-two million, three hundred eighty-eight thousand, six hundred thirty-seven".