133354921 has 12 divisors (see below), whose sum is σ = 156731988. Its totient is φ = 113121792.

The previous prime is 133354889. The next prime is 133354937. The reversal of 133354921 is 129453331.

It can be written as a sum of positive squares in 2 ways, for example, as 65934400 + 67420521 = 8120^2 + 8211^2 .

It is not a de Polignac number, because 133354921 - 2⁵ = 133354889 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133354981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9276 + ... + 18781.

It is an arithmetic number, because the mean of its divisors is an integer number (13060999).

Almost surely, 2^133354921 is an apocalyptic number.

It is an amenable number.

133354921 is a deficient number, since it is larger than the sum of its proper divisors (23377067).

133354921 is an equidigital number, since it uses as much as digits as its factorization.

133354921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28168 (or 28161 counting only the distinct ones).

The product of its digits is 9720, while the sum is 31.

The square root of 133354921 is about 11547.9401193460. The cubic root of 133354921 is about 510.9005248288.

The spelling of 133354921 in words is "one hundred thirty-three million, three hundred fifty-four thousand, nine hundred twenty-one".