135816749 has 4 divisors (see below), whose sum is σ = 136009020. Its totient is φ = 135624480.

The previous prime is 135816671. The next prime is 135816763. The reversal of 135816749 is 947618531.

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

It can be written as a sum of positive squares in 2 ways, for example, as 15760900 + 120055849 = 3970^2 + 10957^2 .

It is a cyclic number.

It is not a de Polignac number, because 135816749 - 2¹² = 135812653 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 (135816049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 95072 + ... + 96489.

It is an arithmetic number, because the mean of its divisors is an integer number (34002255).

Almost surely, 2^135816749 is an apocalyptic number.

It is an amenable number.

135816749 is a deficient number, since it is larger than the sum of its proper divisors (192271).

135816749 is an equidigital number, since it uses as much as digits as its factorization.

135816749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192270.

The product of its digits is 181440, while the sum is 44.

The square root of 135816749 is about 11654.0443194627. The cubic root of 135816749 is about 514.0252388602.

The spelling of 135816749 in words is "one hundred thirty-five million, eight hundred sixteen thousand, seven hundred forty-nine".