135243649 has 8 divisors (see below), whose sum is σ = 138080448. Its totient is φ = 132426960.

The previous prime is 135243623. The next prime is 135243673. The reversal of 135243649 is 946342531.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 135243649 - 2⁹ = 135243137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135243149) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8964 + ... + 18730.

It is an arithmetic number, because the mean of its divisors is an integer number (17260056).

Almost surely, 2^135243649 is an apocalyptic number.

It is an amenable number.

135243649 is a deficient number, since it is larger than the sum of its proper divisors (2836799).

135243649 is an equidigital number, since it uses as much as digits as its factorization.

135243649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10055.

The product of its digits is 77760, while the sum is 37.

The square root of 135243649 is about 11629.4302955906. The cubic root of 135243649 is about 513.3012162493.

The spelling of 135243649 in words is "one hundred thirty-five million, two hundred forty-three thousand, six hundred forty-nine".