133213849 has 8 divisors (see below), whose sum is σ = 139174920. Its totient is φ = 127344000.

The previous prime is 133213793. The next prime is 133213867. The reversal of 133213849 is 948312331.

It can be written as a sum of positive squares in 4 ways, for example, as 17264025 + 115949824 = 4155^2 + 10768^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 133213849 - 2⁹ = 133213337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133213349) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19812 + ... + 25669.

It is an arithmetic number, because the mean of its divisors is an integer number (17396865).

Almost surely, 2^133213849 is an apocalyptic number.

It is an amenable number.

133213849 is a deficient number, since it is larger than the sum of its proper divisors (5961071).

133213849 is a wasteful number, since it uses less digits than its factorization.

133213849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45611.

The product of its digits is 15552, while the sum is 34.

The square root of 133213849 is about 11541.8304007640. The cubic root of 133213849 is about 510.7203060360.

The spelling of 133213849 in words is "one hundred thirty-three million, two hundred thirteen thousand, eight hundred forty-nine".