135969449 has 16 divisors (see below), whose sum is σ = 173131776. Its totient is φ = 103693200.

The previous prime is 135969443. The next prime is 135969467. The reversal of 135969449 is 944969531.

It is a cyclic number.

It is not a de Polignac number, because 135969449 - 2¹² = 135965353 is a prime.

It is a super-2 number, since 2×135969449² = 36975382122727202, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 135969397 and 135969406.

It is not an unprimeable number, because it can be changed into a prime (135969443) 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 15 ways as a sum of consecutive naturals, for example, 15167 + ... + 22404.

It is an arithmetic number, because the mean of its divisors is an integer number (10820736).

Almost surely, 2^135969449 is an apocalyptic number.

It is an amenable number.

135969449 is a deficient number, since it is larger than the sum of its proper divisors (37162327).

135969449 is a wasteful number, since it uses less digits than its factorization.

135969449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37636.

The product of its digits is 1049760, while the sum is 50.

The square root of 135969449 is about 11660.5938528018. The cubic root of 135969449 is about 514.2178077852.

The spelling of 135969449 in words is "one hundred thirty-five million, nine hundred sixty-nine thousand, four hundred forty-nine".