135731647 has 4 divisors (see below), whose sum is σ = 136101856. Its totient is φ = 135361440.

The previous prime is 135731641. The next prime is 135731653. The reversal of 135731647 is 746137531.

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

It is an interprime number because it is at equal distance from previous prime (135731641) and next prime (135731653).

It is a cyclic number.

It is not a de Polignac number, because 135731647 - 2³ = 135731639 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 (135731641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 184554 + ... + 185287.

It is an arithmetic number, because the mean of its divisors is an integer number (34025464).

Almost surely, 2^135731647 is an apocalyptic number.

135731647 is a deficient number, since it is larger than the sum of its proper divisors (370209).

135731647 is an equidigital number, since it uses as much as digits as its factorization.

135731647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 370208.

The product of its digits is 52920, while the sum is 37.

The square root of 135731647 is about 11650.3925684931. The cubic root of 135731647 is about 513.9178546677.

The spelling of 135731647 in words is "one hundred thirty-five million, seven hundred thirty-one thousand, six hundred forty-seven".