133599449 has 4 divisors (see below), whose sum is σ = 133622736. Its totient is φ = 133576164.

The previous prime is 133599421. The next prime is 133599457. The reversal of 133599449 is 944995331.

It is a happy number.

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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 133599449 - 2¹⁶ = 133533913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133599049) 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, 3722 + ... + 16764.

It is an arithmetic number, because the mean of its divisors is an integer number (33405684).

Almost surely, 2^133599449 is an apocalyptic number.

It is an amenable number.

133599449 is a deficient number, since it is larger than the sum of its proper divisors (23287).

133599449 is a wasteful number, since it uses less digits than its factorization.

133599449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23286.

The product of its digits is 524880, while the sum is 47.

The square root of 133599449 is about 11558.5227862387. The cubic root of 133599449 is about 511.2126073046.

The spelling of 133599449 in words is "one hundred thirty-three million, five hundred ninety-nine thousand, four hundred forty-nine".