135896831 has 4 divisors (see below), whose sum is σ = 155310672. Its totient is φ = 116482992.

The previous prime is 135896809. The next prime is 135896833. The reversal of 135896831 is 138698531.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135896831 is a prime.

It is a super-2 number, since 2×135896831² = 36935897351685122, 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 (135896833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9706910 + ... + 9706923.

It is an arithmetic number, because the mean of its divisors is an integer number (38827668).

Almost surely, 2^135896831 is an apocalyptic number.

135896831 is a deficient number, since it is larger than the sum of its proper divisors (19413841).

135896831 is an equidigital number, since it uses as much as digits as its factorization.

135896831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19413840.

The product of its digits is 155520, while the sum is 44.

The square root of 135896831 is about 11657.4796161091. The cubic root of 135896831 is about 514.1262477111.

It can be divided in two parts, 1358 and 96831, that added together give a palindrome (98189).

The spelling of 135896831 in words is "one hundred thirty-five million, eight hundred ninety-six thousand, eight hundred thirty-one".