133242917 has 4 divisors (see below), whose sum is σ = 134091756. Its totient is φ = 132394080.

The previous prime is 133242847. The next prime is 133242919. The reversal of 133242917 is 719242331.

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 14737921 + 118504996 = 3839^2 + 10886^2 .

It is a cyclic number.

It is not a de Polignac number, because 133242917 - 2¹⁶ = 133177381 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 (133242919) 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, 424184 + ... + 424497.

It is an arithmetic number, because the mean of its divisors is an integer number (33522939).

Almost surely, 2^133242917 is an apocalyptic number.

It is an amenable number.

133242917 is a deficient number, since it is larger than the sum of its proper divisors (848839).

133242917 is an equidigital number, since it uses as much as digits as its factorization.

133242917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 848838.

The product of its digits is 9072, while the sum is 32.

The square root of 133242917 is about 11543.0895777517. The cubic root of 133242917 is about 510.7574506680.

The spelling of 133242917 in words is "one hundred thirty-three million, two hundred forty-two thousand, nine hundred seventeen".