163242437 has 2 divisors, whose sum is σ = 163242438. Its totient is φ = 163242436.

The previous prime is 163242427. The next prime is 163242461. The reversal of 163242437 is 734242361.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 149059681 + 14182756 = 12209^2 + 3766^2 .

It is an emirp because it is prime and its reverse (734242361) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 163242437 - 2⁸ = 163242181 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 (163242407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81621218 + 81621219.

It is an arithmetic number, because the mean of its divisors is an integer number (81621219).

Almost surely, 2^163242437 is an apocalyptic number.

It is an amenable number.

163242437 is a deficient number, since it is larger than the sum of its proper divisors (1).

163242437 is an equidigital number, since it uses as much as digits as its factorization.

163242437 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24192, while the sum is 32.

The square root of 163242437 is about 12776.6363726921. The cubic root of 163242437 is about 546.5262461979.

Adding to 163242437 its reverse (734242361), we get a palindrome (897484798).

The spelling of 163242437 in words is "one hundred sixty-three million, two hundred forty-two thousand, four hundred thirty-seven".