135913243 has 2 divisors, whose sum is σ = 135913244. Its totient is φ = 135913242.

The previous prime is 135913229. The next prime is 135913273. The reversal of 135913243 is 342319531.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 135913243 - 2²¹ = 133816091 is a prime.

It is not a weakly prime, because it can be changed into another prime (135913223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67956621 + 67956622.

It is an arithmetic number, because the mean of its divisors is an integer number (67956622).

Almost surely, 2^135913243 is an apocalyptic number.

135913243 is a deficient number, since it is larger than the sum of its proper divisors (1).

135913243 is an equidigital number, since it uses as much as digits as its factorization.

135913243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9720, while the sum is 31.

The square root of 135913243 is about 11658.1835206005. The cubic root of 135913243 is about 514.1469435587.

The spelling of 135913243 in words is "one hundred thirty-five million, nine hundred thirteen thousand, two hundred forty-three".