133538177 has 4 divisors (see below), whose sum is σ = 136643760. Its totient is φ = 130432596.

The previous prime is 133538131. The next prime is 133538191. The reversal of 133538177 is 771835331.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 133538177 - 2¹⁰ = 133537153 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 133538177.

It is not an unprimeable number, because it can be changed into a prime (133558177) 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, 1552727 + ... + 1552812.

It is an arithmetic number, because the mean of its divisors is an integer number (34160940).

Almost surely, 2^133538177 is an apocalyptic number.

It is an amenable number.

133538177 is a deficient number, since it is larger than the sum of its proper divisors (3105583).

133538177 is an equidigital number, since it uses as much as digits as its factorization.

133538177 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3105582.

The product of its digits is 52920, while the sum is 38.

The square root of 133538177 is about 11555.8719705611. The cubic root of 133538177 is about 511.1344437871.

The spelling of 133538177 in words is "one hundred thirty-three million, five hundred thirty-eight thousand, one hundred seventy-seven".