135927391 has 4 divisors (see below), whose sum is σ = 136631872. Its totient is φ = 135222912.

The previous prime is 135927347. The next prime is 135927397. The reversal of 135927391 is 193729531.

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 135927391 - 2²³ = 127538783 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135927397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 351951 + ... + 352336.

It is an arithmetic number, because the mean of its divisors is an integer number (34157968).

Almost surely, 2^135927391 is an apocalyptic number.

135927391 is a deficient number, since it is larger than the sum of its proper divisors (704481).

135927391 is an equidigital number, since it uses as much as digits as its factorization.

135927391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 704480.

The product of its digits is 51030, while the sum is 40.

The square root of 135927391 is about 11658.7902888765. The cubic root of 135927391 is about 514.1647831217.

The spelling of 135927391 in words is "one hundred thirty-five million, nine hundred twenty-seven thousand, three hundred ninety-one".