133237949 has 8 divisors (see below), whose sum is σ = 143582040. Its totient is φ = 122907456.

The previous prime is 133237927. The next prime is 133238041. The reversal of 133237949 is 949732331.

It can be written as a sum of positive squares in 4 ways, for example, as 25452025 + 107785924 = 5045^2 + 10382^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133237949 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 (133230949) 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, 27239 + ... + 31755.

It is an arithmetic number, because the mean of its divisors is an integer number (17947755).

Almost surely, 2^133237949 is an apocalyptic number.

It is an amenable number.

133237949 is a deficient number, since it is larger than the sum of its proper divisors (10344091).

133237949 is a wasteful number, since it uses less digits than its factorization.

133237949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6799.

The product of its digits is 122472, while the sum is 41.

The square root of 133237949 is about 11542.8743820593. The cubic root of 133237949 is about 510.7511026769.

The spelling of 133237949 in words is "one hundred thirty-three million, two hundred thirty-seven thousand, nine hundred forty-nine".