42443197 has 2 divisors, whose sum is σ = 42443198. Its totient is φ = 42443196.

The previous prime is 42443189. The next prime is 42443239. The reversal of 42443197 is 79134424.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34269316 + 8173881 = 5854^2 + 2859^2 .

It is a cyclic number.

It is not a de Polignac number, because 42443197 - 2³ = 42443189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42440197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21221598 + 21221599.

It is an arithmetic number, because the mean of its divisors is an integer number (21221599).

Almost surely, 2^42443197 is an apocalyptic number.

It is an amenable number.

42443197 is a deficient number, since it is larger than the sum of its proper divisors (1).

42443197 is an equidigital number, since it uses as much as digits as its factorization.

42443197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24192, while the sum is 34.

The square root of 42443197 is about 6514.8443573120. The cubic root of 42443197 is about 348.8210591620.

The spelling of 42443197 in words is "forty-two million, four hundred forty-three thousand, one hundred ninety-seven".