135399611 has 4 divisors (see below), whose sum is σ = 143364312. Its totient is φ = 127434912.

The previous prime is 135399581. The next prime is 135399617. The reversal of 135399611 is 116993531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 116993531 = 523 ⋅223697.

It is a cyclic number.

It is not a de Polignac number, because 135399611 - 2⁶ = 135399547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135399617) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3982325 + ... + 3982358.

It is an arithmetic number, because the mean of its divisors is an integer number (35841078).

Almost surely, 2^135399611 is an apocalyptic number.

135399611 is a deficient number, since it is larger than the sum of its proper divisors (7964701).

135399611 is an equidigital number, since it uses as much as digits as its factorization.

135399611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7964700.

The product of its digits is 21870, while the sum is 38.

The square root of 135399611 is about 11636.1338510693. The cubic root of 135399611 is about 513.4984522044.

The spelling of 135399611 in words is "one hundred thirty-five million, three hundred ninety-nine thousand, six hundred eleven".