42537917 has 2 divisors, whose sum is σ = 42537918. Its totient is φ = 42537916.

The previous prime is 42537899. The next prime is 42537931. The reversal of 42537917 is 71973524.

42537917 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., 39513796 + 3024121 = 6286^2 + 1739^2 .

It is a cyclic number.

It is not a de Polignac number, because 42537917 - 2¹⁸ = 42275773 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42537977) 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, 21268958 + 21268959.

It is an arithmetic number, because the mean of its divisors is an integer number (21268959).

Almost surely, 2^42537917 is an apocalyptic number.

It is an amenable number.

42537917 is a deficient number, since it is larger than the sum of its proper divisors (1).

42537917 is an equidigital number, since it uses as much as digits as its factorization.

42537917 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 52920, while the sum is 38.

The square root of 42537917 is about 6522.1098580137. The cubic root of 42537917 is about 349.0803530333.

The spelling of 42537917 in words is "forty-two million, five hundred thirty-seven thousand, nine hundred seventeen".