133357237 has 4 divisors (see below), whose sum is σ = 143615500. Its totient is φ = 123098976.

The previous prime is 133357229. The next prime is 133357267. The reversal of 133357237 is 732753331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 732753331 = 14461 ⋅50671.

It can be written as a sum of positive squares in 2 ways, for example, as 70408881 + 62948356 = 8391^2 + 7934^2 .

It is not a de Polignac number, because 133357237 - 2³ = 133357229 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133357207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5129112 + ... + 5129137.

It is an arithmetic number, because the mean of its divisors is an integer number (35903875).

Almost surely, 2^133357237 is an apocalyptic number.

It is an amenable number.

133357237 is a deficient number, since it is larger than the sum of its proper divisors (10258263).

133357237 is a wasteful number, since it uses less digits than its factorization.

133357237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10258262.

The product of its digits is 39690, while the sum is 34.

The square root of 133357237 is about 11548.0403965348. The cubic root of 133357237 is about 510.9034824469.

The spelling of 133357237 in words is "one hundred thirty-three million, three hundred fifty-seven thousand, two hundred thirty-seven".