135442537 has 2 divisors, whose sum is σ = 135442538. Its totient is φ = 135442536.

The previous prime is 135442529. The next prime is 135442547. The reversal of 135442537 is 735244531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 131537961 + 3904576 = 11469^2 + 1976^2 .

It is a cyclic number.

It is not a de Polignac number, because 135442537 - 2³ = 135442529 is a prime.

It is not a weakly prime, because it can be changed into another prime (135442547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67721268 + 67721269.

It is an arithmetic number, because the mean of its divisors is an integer number (67721269).

Almost surely, 2^135442537 is an apocalyptic number.

It is an amenable number.

135442537 is a deficient number, since it is larger than the sum of its proper divisors (1).

135442537 is an equidigital number, since it uses as much as digits as its factorization.

135442537 is an evil number, because the sum of its binary digits is even.

The product of its digits is 50400, while the sum is 34.

The square root of 135442537 is about 11637.9782178865. The cubic root of 135442537 is about 513.5527116059.

The spelling of 135442537 in words is "one hundred thirty-five million, four hundred forty-two thousand, five hundred thirty-seven".