42938197 has 2 divisors, whose sum is σ = 42938198. Its totient is φ = 42938196.

The previous prime is 42938191. The next prime is 42938201. The reversal of 42938197 is 79183924.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36857041 + 6081156 = 6071^2 + 2466^2 .

It is a cyclic number.

It is not a de Polignac number, because 42938197 - 2²³ = 34549589 is a prime.

It is a super-2 number, since 2×42938197² = 3687377523221618, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42938191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21469098 + 21469099.

It is an arithmetic number, because the mean of its divisors is an integer number (21469099).

Almost surely, 2^42938197 is an apocalyptic number.

It is an amenable number.

42938197 is a deficient number, since it is larger than the sum of its proper divisors (1).

42938197 is an equidigital number, since it uses as much as digits as its factorization.

42938197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108864, while the sum is 43.

The square root of 42938197 is about 6552.7243952420. The cubic root of 42938197 is about 350.1718802040.

The spelling of 42938197 in words is "forty-two million, nine hundred thirty-eight thousand, one hundred ninety-seven".