133535449 has 4 divisors (see below), whose sum is σ = 134089780. Its totient is φ = 132981120.

The previous prime is 133535443. The next prime is 133535471. The reversal of 133535449 is 944535331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 944535331 = 107 ⋅8827433.

It can be written as a sum of positive squares in 2 ways, for example, as 99102025 + 34433424 = 9955^2 + 5868^2 .

It is a cyclic number.

It is not a de Polignac number, because 133535449 - 2¹³ = 133527257 is a prime.

It is a super-2 number, since 2×133535449² = 35663432279263202, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133535443) 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, 276804 + ... + 277285.

It is an arithmetic number, because the mean of its divisors is an integer number (33522445).

Almost surely, 2^133535449 is an apocalyptic number.

It is an amenable number.

133535449 is a deficient number, since it is larger than the sum of its proper divisors (554331).

133535449 is an equidigital number, since it uses as much as digits as its factorization.

133535449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 554330.

The product of its digits is 97200, while the sum is 37.

The square root of 133535449 is about 11555.7539347288. The cubic root of 133535449 is about 511.1309631738.

The spelling of 133535449 in words is "one hundred thirty-three million, five hundred thirty-five thousand, four hundred forty-nine".