133579849 has 4 divisors (see below), whose sum is σ = 143855236. Its totient is φ = 123304464.

The previous prime is 133579807. The next prime is 133579867. The reversal of 133579849 is 948975331.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 64689849 + 68890000 = 8043^2 + 8300^2 .

It is a cyclic number.

It is not a de Polignac number, because 133579849 - 2¹³ = 133571657 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 8.

It is not an unprimeable number, because it can be changed into a prime (133579349) 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, 5137674 + ... + 5137699.

It is an arithmetic number, because the mean of its divisors is an integer number (35963809).

Almost surely, 2^133579849 is an apocalyptic number.

It is an amenable number.

133579849 is a deficient number, since it is larger than the sum of its proper divisors (10275387).

133579849 is a wasteful number, since it uses less digits than its factorization.

133579849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10275386.

The product of its digits is 816480, while the sum is 49.

The square root of 133579849 is about 11557.6748959295. The cubic root of 133579849 is about 511.1876065599.

The spelling of 133579849 in words is "one hundred thirty-three million, five hundred seventy-nine thousand, eight hundred forty-nine".