133164491 has 8 divisors (see below), whose sum is σ = 137981280. Its totient is φ = 128362752.

The previous prime is 133164487. The next prime is 133164523. The reversal of 133164491 is 194461331.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 133164491 - 2² = 133164487 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133164401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16106 + ... + 22928.

It is an arithmetic number, because the mean of its divisors is an integer number (17247660).

Almost surely, 2^133164491 is an apocalyptic number.

133164491 is a deficient number, since it is larger than the sum of its proper divisors (4816789).

133164491 is an equidigital number, since it uses as much as digits as its factorization.

133164491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7525.

The product of its digits is 7776, while the sum is 32.

The square root of 133164491 is about 11539.6919802913. The cubic root of 133164491 is about 510.6572213866.

The spelling of 133164491 in words is "one hundred thirty-three million, one hundred sixty-four thousand, four hundred ninety-one".