133143999 has 8 divisors (see below), whose sum is σ = 178455552. Its totient is φ = 88297560.

The previous prime is 133143991. The next prime is 133144021. The reversal of 133143999 is 999341331.

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

It is not a de Polignac number, because 133143999 - 2³ = 133143991 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 133143999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133143991) 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, 115609 + ... + 116754.

It is an arithmetic number, because the mean of its divisors is an integer number (22306944).

Almost surely, 2^133143999 is an apocalyptic number.

133143999 is a deficient number, since it is larger than the sum of its proper divisors (45311553).

133143999 is a wasteful number, since it uses less digits than its factorization.

133143999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232557.

The product of its digits is 78732, while the sum is 42.

The square root of 133143999 is about 11538.8040541470. The cubic root of 133143999 is about 510.6310259033.

The spelling of 133143999 in words is "one hundred thirty-three million, one hundred forty-three thousand, nine hundred ninety-nine".