135987320243 has 2 divisors, whose sum is σ = 135987320244. Its totient is φ = 135987320242.

The previous prime is 135987320237. The next prime is 135987320323. The reversal of 135987320243 is 342023789531.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 135987320243 - 2⁸ = 135987319987 is a prime.

It is not a weakly prime, because it can be changed into another prime (135987320213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67993660121 + 67993660122.

It is an arithmetic number, because the mean of its divisors is an integer number (67993660122).

Almost surely, 2^135987320243 is an apocalyptic number.

135987320243 is a deficient number, since it is larger than the sum of its proper divisors (1).

135987320243 is an equidigital number, since it uses as much as digits as its factorization.

135987320243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1088640, while the sum is 47.

The spelling of 135987320243 in words is "one hundred thirty-five billion, nine hundred eighty-seven million, three hundred twenty thousand, two hundred forty-three".