133400643 has 8 divisors (see below), whose sum is σ = 177976656. Its totient is φ = 88879200.

The previous prime is 133400639. The next prime is 133400677. The reversal of 133400643 is 346004331.

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

It is not a de Polignac number, because 133400643 - 2² = 133400639 is a prime.

It is not an unprimeable number, because it can be changed into a prime (133400633) 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, 7548 + ... + 17993.

It is an arithmetic number, because the mean of its divisors is an integer number (22247082).

Almost surely, 2^133400643 is an apocalyptic number.

133400643 is a deficient number, since it is larger than the sum of its proper divisors (44576013).

133400643 is a wasteful number, since it uses less digits than its factorization.

133400643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27285.

The product of its (nonzero) digits is 2592, while the sum is 24.

The square root of 133400643 is about 11549.9196101098. The cubic root of 133400643 is about 510.9589071879.

Adding to 133400643 its reverse (346004331), we get a palindrome (479404974).

The spelling of 133400643 in words is "one hundred thirty-three million, four hundred thousand, six hundred forty-three".