135953549 has 4 divisors (see below), whose sum is σ = 137674560. Its totient is φ = 134232540.

The previous prime is 135953527. The next prime is 135953557. The reversal of 135953549 is 945359531.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 945359531 = 5563 ⋅169937.

It is a cyclic number.

It is not a de Polignac number, because 135953549 - 2¹² = 135949453 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135953149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 860387 + ... + 860544.

It is an arithmetic number, because the mean of its divisors is an integer number (34418640).

Almost surely, 2^135953549 is an apocalyptic number.

It is an amenable number.

135953549 is a deficient number, since it is larger than the sum of its proper divisors (1721011).

135953549 is an equidigital number, since it uses as much as digits as its factorization.

135953549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1721010.

The product of its digits is 364500, while the sum is 44.

The square root of 135953549 is about 11659.9120494110. The cubic root of 135953549 is about 514.1977631307.

The spelling of 135953549 in words is "one hundred thirty-five million, nine hundred fifty-three thousand, five hundred forty-nine".