135560731 has 2 divisors, whose sum is σ = 135560732. Its totient is φ = 135560730.

The previous prime is 135560713. The next prime is 135560759. The reversal of 135560731 is 137065531.

Together with previous prime (135560713) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is an emirp because it is prime and its reverse (137065531) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 135560731 - 2⁹ = 135560219 is a prime.

It is a super-2 number, since 2×135560731² = 36753423578508722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 135560693 and 135560702.

It is not a weakly prime, because it can be changed into another prime (135560791) 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, 67780365 + 67780366.

It is an arithmetic number, because the mean of its divisors is an integer number (67780366).

Almost surely, 2^135560731 is an apocalyptic number.

135560731 is a deficient number, since it is larger than the sum of its proper divisors (1).

135560731 is an equidigital number, since it uses as much as digits as its factorization.

135560731 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9450, while the sum is 31.

The square root of 135560731 is about 11643.0550544090. The cubic root of 135560731 is about 513.7020521868.

The spelling of 135560731 in words is "one hundred thirty-five million, five hundred sixty thousand, seven hundred thirty-one".