135394531 has 2 divisors, whose sum is σ = 135394532. Its totient is φ = 135394530.

The previous prime is 135394529. The next prime is 135394547. The reversal of 135394531 is 135493531.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 135394531 - 2¹ = 135394529 is a prime.

It is a super-2 number, since 2×135394531² = 36663358049419922, which contains 22 as substring.

Together with 135394529, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (135394561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67697265 + 67697266.

It is an arithmetic number, because the mean of its divisors is an integer number (67697266).

Almost surely, 2^135394531 is an apocalyptic number.

135394531 is a deficient number, since it is larger than the sum of its proper divisors (1).

135394531 is an equidigital number, since it uses as much as digits as its factorization.

135394531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24300, while the sum is 34.

The square root of 135394531 is about 11635.9155634613. The cubic root of 135394531 is about 513.4920302146.

The spelling of 135394531 in words is "one hundred thirty-five million, three hundred ninety-four thousand, five hundred thirty-one".