42870197 has 2 divisors, whose sum is σ = 42870198. Its totient is φ = 42870196.

The previous prime is 42870181. The next prime is 42870211. The reversal of 42870197 is 79107824.

42870197 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., 38056561 + 4813636 = 6169^2 + 2194^2 .

It is a cyclic number.

It is not a de Polignac number, because 42870197 - 2⁴ = 42870181 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42870197.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42870397) 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, 21435098 + 21435099.

It is an arithmetic number, because the mean of its divisors is an integer number (21435099).

Almost surely, 2^42870197 is an apocalyptic number.

It is an amenable number.

42870197 is a deficient number, since it is larger than the sum of its proper divisors (1).

42870197 is an equidigital number, since it uses as much as digits as its factorization.

42870197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28224, while the sum is 38.

The square root of 42870197 is about 6547.5336577982. The cubic root of 42870197 is about 349.9869301242.

The spelling of 42870197 in words is "forty-two million, eight hundred seventy thousand, one hundred ninety-seven".