135899773 has 2 divisors, whose sum is σ = 135899774. Its totient is φ = 135899772.

The previous prime is 135899759. The next prime is 135899807. The reversal of 135899773 is 377998531.

It is a happy number.

135899773 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 can be written as a sum of positive squares in only one way, i.e., 135536164 + 363609 = 11642^2 + 603^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135899773 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 135899773.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135899273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67949886 + 67949887.

It is an arithmetic number, because the mean of its divisors is an integer number (67949887).

Almost surely, 2^135899773 is an apocalyptic number.

It is an amenable number.

135899773 is a deficient number, since it is larger than the sum of its proper divisors (1).

135899773 is an equidigital number, since it uses as much as digits as its factorization.

135899773 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1428840, while the sum is 52.

The square root of 135899773 is about 11657.6058005064. The cubic root of 135899773 is about 514.1299577523.

The spelling of 135899773 in words is "one hundred thirty-five million, eight hundred ninety-nine thousand, seven hundred seventy-three".