135938395231 has 2 divisors, whose sum is σ = 135938395232. Its totient is φ = 135938395230.

The previous prime is 135938395169. The next prime is 135938395249. The reversal of 135938395231 is 132593839531.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 135938395231 - 2²¹ = 135936298079 is a prime.

It is a super-2 number, since 2×135938395231² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135938395031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67969197615 + 67969197616.

It is an arithmetic number, because the mean of its divisors is an integer number (67969197616).

Almost surely, 2^135938395231 is an apocalyptic number.

135938395231 is a deficient number, since it is larger than the sum of its proper divisors (1).

135938395231 is an equidigital number, since it uses as much as digits as its factorization.

135938395231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2624400, while the sum is 52.

The spelling of 135938395231 in words is "one hundred thirty-five billion, nine hundred thirty-eight million, three hundred ninety-five thousand, two hundred thirty-one".