135899233 has 2 divisors, whose sum is σ = 135899234. Its totient is φ = 135899232.

The previous prime is 135899227. The next prime is 135899263. The reversal of 135899233 is 332998531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 118200384 + 17698849 = 10872^2 + 4207^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135899233 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 135899233.

It is not a weakly prime, because it can be changed into another prime (135899263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67949616 + 67949617.

It is an arithmetic number, because the mean of its divisors is an integer number (67949617).

Almost surely, 2^135899233 is an apocalyptic number.

It is an amenable number.

135899233 is a deficient number, since it is larger than the sum of its proper divisors (1).

135899233 is an equidigital number, since it uses as much as digits as its factorization.

135899233 is an evil number, because the sum of its binary digits is even.

The product of its digits is 174960, while the sum is 43.

The square root of 135899233 is about 11657.5826396385. The cubic root of 135899233 is about 514.1292767834.

It can be divided in two parts, 13589 and 9233, that added together give a palindrome (22822).

The spelling of 135899233 in words is "one hundred thirty-five million, eight hundred ninety-nine thousand, two hundred thirty-three".