135978049 has 8 divisors (see below), whose sum is σ = 138101760. Its totient is φ = 133861536.

The previous prime is 135978043. The next prime is 135978091. The reversal of 135978049 is 940879531.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135978049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135978043) 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 7 ways as a sum of consecutive naturals, for example, 45792 + ... + 48670.

It is an arithmetic number, because the mean of its divisors is an integer number (17262720).

Almost surely, 2^135978049 is an apocalyptic number.

It is an amenable number.

135978049 is a deficient number, since it is larger than the sum of its proper divisors (2123711).

135978049 is an equidigital number, since it uses as much as digits as its factorization.

135978049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3599.

The product of its (nonzero) digits is 272160, while the sum is 46.

The square root of 135978049 is about 11660.9626103508. The cubic root of 135978049 is about 514.2286488968.

The spelling of 135978049 in words is "one hundred thirty-five million, nine hundred seventy-eight thousand, forty-nine".