133754321 has 2 divisors, whose sum is σ = 133754322. Its totient is φ = 133754320.

The previous prime is 133754287. The next prime is 133754389. The reversal of 133754321 is 123457331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 86694721 + 47059600 = 9311^2 + 6860^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133754321 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (133754021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66877160 + 66877161.

It is an arithmetic number, because the mean of its divisors is an integer number (66877161).

Almost surely, 2^133754321 is an apocalyptic number.

It is an amenable number.

133754321 is a deficient number, since it is larger than the sum of its proper divisors (1).

133754321 is an equidigital number, since it uses as much as digits as its factorization.

133754321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7560, while the sum is 29.

The square root of 133754321 is about 11565.2203178323. The cubic root of 133754321 is about 511.4100680632.

The spelling of 133754321 in words is "one hundred thirty-three million, seven hundred fifty-four thousand, three hundred twenty-one".