42397637 has 2 divisors, whose sum is σ = 42397638. Its totient is φ = 42397636.

The previous prime is 42397627. The next prime is 42397651. The reversal of 42397637 is 73679324.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31013761 + 11383876 = 5569^2 + 3374^2 .

It is a cyclic number.

It is not a de Polignac number, because 42397637 - 2¹⁴ = 42381253 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 42397594 and 42397603.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42397627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21198818 + 21198819.

It is an arithmetic number, because the mean of its divisors is an integer number (21198819).

Almost surely, 2^42397637 is an apocalyptic number.

It is an amenable number.

42397637 is a deficient number, since it is larger than the sum of its proper divisors (1).

42397637 is an equidigital number, since it uses as much as digits as its factorization.

42397637 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 190512, while the sum is 41.

The square root of 42397637 is about 6511.3467884916. The cubic root of 42397637 is about 348.6962022676.

It can be divided in two parts, 42397 and 637, that added together give a palindrome (43034).

The spelling of 42397637 in words is "forty-two million, three hundred ninety-seven thousand, six hundred thirty-seven".