133485643 has 4 divisors (see below), whose sum is σ = 133509568. Its totient is φ = 133461720.

The previous prime is 133485623. The next prime is 133485679. The reversal of 133485643 is 346584331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 346584331 = 53 ⋅6539327.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133485643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133485613) 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, 1333 + ... + 16393.

It is an arithmetic number, because the mean of its divisors is an integer number (33377392).

Almost surely, 2^133485643 is an apocalyptic number.

133485643 is a deficient number, since it is larger than the sum of its proper divisors (23925).

133485643 is an equidigital number, since it uses as much as digits as its factorization.

133485643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23924.

The product of its digits is 103680, while the sum is 37.

The square root of 133485643 is about 11553.5987034344. The cubic root of 133485643 is about 511.0674081288.

The spelling of 133485643 in words is "one hundred thirty-three million, four hundred eighty-five thousand, six hundred forty-three".