135123647 has 4 divisors (see below), whose sum is σ = 135611736. Its totient is φ = 134635560.

The previous prime is 135123613. The next prime is 135123671. The reversal of 135123647 is 746321531.

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 135123647 - 2²² = 130929343 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 (135123607) 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, 243629 + ... + 244182.

It is an arithmetic number, because the mean of its divisors is an integer number (33902934).

Almost surely, 2^135123647 is an apocalyptic number.

135123647 is a deficient number, since it is larger than the sum of its proper divisors (488089).

135123647 is an equidigital number, since it uses as much as digits as its factorization.

135123647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 488088.

The product of its digits is 15120, while the sum is 32.

The square root of 135123647 is about 11624.2697405041. The cubic root of 135123647 is about 513.1493535421.

The spelling of 135123647 in words is "one hundred thirty-five million, one hundred twenty-three thousand, six hundred forty-seven".