135139031 has 2 divisors, whose sum is σ = 135139032. Its totient is φ = 135139030.

The previous prime is 135139021. The next prime is 135139033. The reversal of 135139031 is 130931531.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135139031 is a prime.

It is a super-2 number, since 2×135139031² = 36525115399237922, which contains 22 as substring.

Together with 135139033, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135139033) 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, 67569515 + 67569516.

It is an arithmetic number, because the mean of its divisors is an integer number (67569516).

Almost surely, 2^135139031 is an apocalyptic number.

135139031 is a deficient number, since it is larger than the sum of its proper divisors (1).

135139031 is an equidigital number, since it uses as much as digits as its factorization.

135139031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1215, while the sum is 26.

The square root of 135139031 is about 11624.9314406580. The cubic root of 135139031 is about 513.1688270398.

The spelling of 135139031 in words is "one hundred thirty-five million, one hundred thirty-nine thousand, thirty-one".