135849139 has 4 divisors (see below), whose sum is σ = 136207960. Its totient is φ = 135490320.

The previous prime is 135849101. The next prime is 135849143. The reversal of 135849139 is 931948531.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 135849139 - 2⁹ = 135848627 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 135849095 and 135849104.

It is not an unprimeable number, because it can be changed into a prime (135849239) 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, 178842 + ... + 179599.

It is an arithmetic number, because the mean of its divisors is an integer number (34051990).

Almost surely, 2^135849139 is an apocalyptic number.

135849139 is a deficient number, since it is larger than the sum of its proper divisors (358821).

135849139 is an equidigital number, since it uses as much as digits as its factorization.

135849139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358820.

The product of its digits is 116640, while the sum is 43.

The square root of 135849139 is about 11655.4338829578. The cubic root of 135849139 is about 514.0660977240.

The spelling of 135849139 in words is "one hundred thirty-five million, eight hundred forty-nine thousand, one hundred thirty-nine".