133799321 has 2 divisors, whose sum is σ = 133799322. Its totient is φ = 133799320.

The previous prime is 133799297. The next prime is 133799357. The reversal of 133799321 is 123997331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 119661721 + 14137600 = 10939^2 + 3760^2 .

It is a cyclic number.

It is not a de Polignac number, because 133799321 - 2¹⁰ = 133798297 is a prime.

It is a super-2 number, since 2×133799321² = 35804516600122082, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (133799381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66899660 + 66899661.

It is an arithmetic number, because the mean of its divisors is an integer number (66899661).

Almost surely, 2^133799321 is an apocalyptic number.

It is an amenable number.

133799321 is a deficient number, since it is larger than the sum of its proper divisors (1).

133799321 is an equidigital number, since it uses as much as digits as its factorization.

133799321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30618, while the sum is 38.

The square root of 133799321 is about 11567.1656424554. The cubic root of 133799321 is about 511.4674141798.

The spelling of 133799321 in words is "one hundred thirty-three million, seven hundred ninety-nine thousand, three hundred twenty-one".