135781847 has 6 divisors (see below), whose sum is σ = 143304768. Its totient is φ = 128635092.

The previous prime is 135781837. The next prime is 135781853. The reversal of 135781847 is 748187531.

It is not a de Polignac number, because 135781847 - 2¹⁰ = 135780823 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 135781798 and 135781807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135781837) 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 5 ways as a sum of consecutive naturals, for example, 187703 + ... + 188424.

It is an arithmetic number, because the mean of its divisors is an integer number (23884128).

Almost surely, 2^135781847 is an apocalyptic number.

135781847 is a deficient number, since it is larger than the sum of its proper divisors (7522921).

135781847 is an equidigital number, since it uses as much as digits as its factorization.

135781847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376165 (or 376146 counting only the distinct ones).

The product of its digits is 188160, while the sum is 44.

The square root of 135781847 is about 11652.5468031671. The cubic root of 135781847 is about 513.9812039234.

The spelling of 135781847 in words is "one hundred thirty-five million, seven hundred eighty-one thousand, eight hundred forty-seven".