135291137 has 2 divisors, whose sum is σ = 135291138. Its totient is φ = 135291136.

The previous prime is 135291131. The next prime is 135291193. The reversal of 135291137 is 731192531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 126315121 + 8976016 = 11239^2 + 2996^2 .

It is a cyclic number.

It is not a de Polignac number, because 135291137 - 2²⁶ = 68182273 is a prime.

It is not a weakly prime, because it can be changed into another prime (135291131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67645568 + 67645569.

It is an arithmetic number, because the mean of its divisors is an integer number (67645569).

Almost surely, 2^135291137 is an apocalyptic number.

It is an amenable number.

135291137 is a deficient number, since it is larger than the sum of its proper divisors (1).

135291137 is an equidigital number, since it uses as much as digits as its factorization.

135291137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5670, while the sum is 32.

The square root of 135291137 is about 11631.4718329195. The cubic root of 135291137 is about 513.3612875746.

The spelling of 135291137 in words is "one hundred thirty-five million, two hundred ninety-one thousand, one hundred thirty-seven".