135143237 has 2 divisors, whose sum is σ = 135143238. Its totient is φ = 135143236.

The previous prime is 135143233. The next prime is 135143273. The reversal of 135143237 is 732341531.

Together with next prime (135143273) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 118504996 + 16638241 = 10886^2 + 4079^2 .

It is an emirp because it is prime and its reverse (732341531) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 135143237 - 2² = 135143233 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135143231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67571618 + 67571619.

It is an arithmetic number, because the mean of its divisors is an integer number (67571619).

Almost surely, 2^135143237 is an apocalyptic number.

It is an amenable number.

135143237 is a deficient number, since it is larger than the sum of its proper divisors (1).

135143237 is an equidigital number, since it uses as much as digits as its factorization.

135143237 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7560, while the sum is 29.

The square root of 135143237 is about 11625.1123435432. The cubic root of 135143237 is about 513.1741508551.

Adding to 135143237 its reverse (732341531), we get a palindrome (867484768).

The spelling of 135143237 in words is "one hundred thirty-five million, one hundred forty-three thousand, two hundred thirty-seven".