133975449 has 12 divisors (see below), whose sum is σ = 195330096. Its totient is φ = 88481592.

The previous prime is 133975433. The next prime is 133975463. The reversal of 133975449 is 944579331.

133975449 is a `hidden beast` number, since 13 + 3 + 97 + 544 + 9 = 666.

It is not a de Polignac number, because 133975449 - 2⁴ = 133975433 is a prime.

It is not an unprimeable number, because it can be changed into a prime (133975549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 68599 + ... + 70524.

It is an arithmetic number, because the mean of its divisors is an integer number (16277508).

Almost surely, 2^133975449 is an apocalyptic number.

It is an amenable number.

133975449 is a deficient number, since it is larger than the sum of its proper divisors (61354647).

133975449 is a wasteful number, since it uses less digits than its factorization.

133975449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139236 (or 139233 counting only the distinct ones).

The product of its digits is 408240, while the sum is 45.

The square root of 133975449 is about 11574.7764125274. The cubic root of 133975449 is about 511.6917407644.

The spelling of 133975449 in words is "one hundred thirty-three million, nine hundred seventy-five thousand, four hundred forty-nine".