133574137 has 4 divisors (see below), whose sum is σ = 135075060. Its totient is φ = 132073216.

The previous prime is 133574027. The next prime is 133574167. The reversal of 133574137 is 731475331.

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 31483321 + 102090816 = 5611^2 + 10104^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133574137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133574167) 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, 750328 + ... + 750505.

It is an arithmetic number, because the mean of its divisors is an integer number (33768765).

Almost surely, 2^133574137 is an apocalyptic number.

It is an amenable number.

133574137 is a deficient number, since it is larger than the sum of its proper divisors (1500923).

133574137 is an equidigital number, since it uses as much as digits as its factorization.

133574137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1500922.

The product of its digits is 26460, while the sum is 34.

The square root of 133574137 is about 11557.4277847625. The cubic root of 133574137 is about 511.1803201684.

The spelling of 133574137 in words is "one hundred thirty-three million, five hundred seventy-four thousand, one hundred thirty-seven".