133884421 has 4 divisors (see below), whose sum is σ = 146055744. Its totient is φ = 121713100.

The previous prime is 133884379. The next prime is 133884467. The reversal of 133884421 is 124488331.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 133884421 - 2¹³ = 133876229 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 (133884481) 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, 6085645 + ... + 6085666.

It is an arithmetic number, because the mean of its divisors is an integer number (36513936).

Almost surely, 2^133884421 is an apocalyptic number.

133884421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

133884421 is a deficient number, since it is larger than the sum of its proper divisors (12171323).

133884421 is a wasteful number, since it uses less digits than its factorization.

133884421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12171322.

The product of its digits is 18432, while the sum is 34.

The square root of 133884421 is about 11570.8435733960. The cubic root of 133884421 is about 511.5758269181.

The spelling of 133884421 in words is "one hundred thirty-three million, eight hundred eighty-four thousand, four hundred twenty-one".