135992431 has 4 divisors (see below), whose sum is σ = 136371600. Its totient is φ = 135613264.

The previous prime is 135992419. The next prime is 135992447. The reversal of 135992431 is 134299531.

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 135992431 - 2¹³ = 135984239 is a prime.

It is a super-2 number, since 2×135992431² = 36987882578579522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135992471) 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, 189046 + ... + 189763.

It is an arithmetic number, because the mean of its divisors is an integer number (34092900).

Almost surely, 2^135992431 is an apocalyptic number.

135992431 is a deficient number, since it is larger than the sum of its proper divisors (379169).

135992431 is an equidigital number, since it uses as much as digits as its factorization.

135992431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 379168.

The product of its digits is 29160, while the sum is 37.

The square root of 135992431 is about 11661.5792669775. The cubic root of 135992431 is about 514.2467777437.

The spelling of 135992431 in words is "one hundred thirty-five million, nine hundred ninety-two thousand, four hundred thirty-one".