133146443 has 4 divisors (see below), whose sum is σ = 134368080. Its totient is φ = 131924808.

The previous prime is 133146437. The next prime is 133146449. The reversal of 133146443 is 344641331.

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

It is an interprime number because it is at equal distance from previous prime (133146437) and next prime (133146449).

It is a cyclic number.

It is not a de Polignac number, because 133146443 - 2⁴ = 133146427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133146449) 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, 610655 + ... + 610872.

It is an arithmetic number, because the mean of its divisors is an integer number (33592020).

Almost surely, 2^133146443 is an apocalyptic number.

133146443 is a deficient number, since it is larger than the sum of its proper divisors (1221637).

133146443 is a wasteful number, since it uses less digits than its factorization.

133146443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1221636.

The product of its digits is 10368, while the sum is 29.

The square root of 133146443 is about 11538.9099571840. The cubic root of 133146443 is about 510.6341502765.

Adding to 133146443 its reverse (344641331), we get a palindrome (477787774).

It can be divided in two parts, 1331 and 46443, that added together give a palindrome (47774).

The spelling of 133146443 in words is "one hundred thirty-three million, one hundred forty-six thousand, four hundred forty-three".