133546643 has 4 divisors (see below), whose sum is σ = 133856928. Its totient is φ = 133236360.

The previous prime is 133546631. The next prime is 133546657. The reversal of 133546643 is 346645331.

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 133546643 - 2¹⁴ = 133530259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133546043) 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, 154496 + ... + 155357.

It is an arithmetic number, because the mean of its divisors is an integer number (33464232).

Almost surely, 2^133546643 is an apocalyptic number.

133546643 is a deficient number, since it is larger than the sum of its proper divisors (310285).

133546643 is an equidigital number, since it uses as much as digits as its factorization.

133546643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310284.

The product of its digits is 77760, while the sum is 35.

The square root of 133546643 is about 11556.2382720330. The cubic root of 133546643 is about 511.1452451246.

The spelling of 133546643 in words is "one hundred thirty-three million, five hundred forty-six thousand, six hundred forty-three".