135920723 has 2 divisors, whose sum is σ = 135920724. Its totient is φ = 135920722.

The previous prime is 135920713. The next prime is 135920747. The reversal of 135920723 is 327029531.

135920723 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is an emirp because it is prime and its reverse (327029531) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 135920723 - 2⁸ = 135920467 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 135920723.

It is not a weakly prime, because it can be changed into another prime (135920713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67960361 + 67960362.

It is an arithmetic number, because the mean of its divisors is an integer number (67960362).

Almost surely, 2^135920723 is an apocalyptic number.

135920723 is a deficient number, since it is larger than the sum of its proper divisors (1).

135920723 is an equidigital number, since it uses as much as digits as its factorization.

135920723 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11340, while the sum is 32.

The square root of 135920723 is about 11658.5043208810. The cubic root of 135920723 is about 514.1563754299.

The spelling of 135920723 in words is "one hundred thirty-five million, nine hundred twenty thousand, seven hundred twenty-three".