133767913 has 4 divisors (see below), whose sum is σ = 137383300. Its totient is φ = 130152528.

The previous prime is 133767911. The next prime is 133767971. The reversal of 133767913 is 319767331.

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 63409369 + 70358544 = 7963^2 + 8388^2 .

It is a cyclic number.

It is not a de Polignac number, because 133767913 - 2¹ = 133767911 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133767911) 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, 1807638 + ... + 1807711.

It is an arithmetic number, because the mean of its divisors is an integer number (34345825).

Almost surely, 2^133767913 is an apocalyptic number.

It is an amenable number.

133767913 is a deficient number, since it is larger than the sum of its proper divisors (3615387).

133767913 is an equidigital number, since it uses as much as digits as its factorization.

133767913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3615386.

The product of its digits is 71442, while the sum is 40.

The square root of 133767913 is about 11565.8079268160. The cubic root of 133767913 is about 511.4273904947.

The spelling of 133767913 in words is "one hundred thirty-three million, seven hundred sixty-seven thousand, nine hundred thirteen".