133427321 has 2 divisors, whose sum is σ = 133427322. Its totient is φ = 133427320.

The previous prime is 133427309. The next prime is 133427369. The reversal of 133427321 is 123724331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 79566400 + 53860921 = 8920^2 + 7339^2 .

It is a cyclic number.

It is not a de Polignac number, because 133427321 - 2¹⁸ = 133165177 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (133427381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66713660 + 66713661.

It is an arithmetic number, because the mean of its divisors is an integer number (66713661).

Almost surely, 2^133427321 is an apocalyptic number.

It is an amenable number.

133427321 is a deficient number, since it is larger than the sum of its proper divisors (1).

133427321 is an equidigital number, since it uses as much as digits as its factorization.

133427321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3024, while the sum is 26.

The square root of 133427321 is about 11551.0744521884. The cubic root of 133427321 is about 510.9929661270.

The spelling of 133427321 in words is "one hundred thirty-three million, four hundred twenty-seven thousand, three hundred twenty-one".