133998823 has 8 divisors (see below), whose sum is σ = 154547360. Its totient is φ = 113801760.

The previous prime is 133998817. The next prime is 133998847. The reversal of 133998823 is 328899331.

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

It is a cyclic number.

It is not a de Polignac number, because 133998823 - 2¹³ = 133990631 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133998803) 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, 87048 + ... + 88573.

It is an arithmetic number, because the mean of its divisors is an integer number (19318420).

Almost surely, 2^133998823 is an apocalyptic number.

133998823 is a deficient number, since it is larger than the sum of its proper divisors (20548537).

133998823 is a wasteful number, since it uses less digits than its factorization.

133998823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175737.

The product of its digits is 279936, while the sum is 46.

The square root of 133998823 is about 11575.7860640217. The cubic root of 133998823 is about 511.7214964332.

It can be divided in two parts, 13399 and 8823, that added together give a palindrome (22222).

The spelling of 133998823 in words is "one hundred thirty-three million, nine hundred ninety-eight thousand, eight hundred twenty-three".