133498821 has 8 divisors (see below), whose sum is σ = 178124544. Its totient is φ = 88936160.

The previous prime is 133498801. The next prime is 133498837. The reversal of 133498821 is 128894331.

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 133498821 - 2²³ = 125110213 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 133498821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133498801) 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, 10581 + ... + 19466.

It is an arithmetic number, because the mean of its divisors is an integer number (22265568).

Almost surely, 2^133498821 is an apocalyptic number.

It is an amenable number.

133498821 is a deficient number, since it is larger than the sum of its proper divisors (44625723).

133498821 is a wasteful number, since it uses less digits than its factorization.

133498821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31531.

The product of its digits is 41472, while the sum is 39.

The square root of 133498821 is about 11554.1689878589. The cubic root of 133498821 is about 511.0842254796.

The spelling of 133498821 in words is "one hundred thirty-three million, four hundred ninety-eight thousand, eight hundred twenty-one".