133332691 has 4 divisors (see below), whose sum is σ = 137930400. Its totient is φ = 128734984.

The previous prime is 133332677. The next prime is 133332701. The reversal of 133332691 is 196233331.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 133332691 - 2⁵ = 133332659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133332631) 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, 2298811 + ... + 2298868.

It is an arithmetic number, because the mean of its divisors is an integer number (34482600).

Almost surely, 2^133332691 is an apocalyptic number.

133332691 is a deficient number, since it is larger than the sum of its proper divisors (4597709).

133332691 is an equidigital number, since it uses as much as digits as its factorization.

133332691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4597708.

The product of its digits is 8748, while the sum is 31.

The square root of 133332691 is about 11546.9775699098. The cubic root of 133332691 is about 510.8721345509.

The spelling of 133332691 in words is "one hundred thirty-three million, three hundred thirty-two thousand, six hundred ninety-one".