133213337 has 2 divisors, whose sum is σ = 133213338. Its totient is φ = 133213336.

The previous prime is 133213277. The next prime is 133213349. The reversal of 133213337 is 733312331.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75620416 + 57592921 = 8696^2 + 7589^2 .

It is a cyclic number.

It is not a de Polignac number, because 133213337 - 2⁶ = 133213273 is a prime.

It is not a weakly prime, because it can be changed into another prime (133213397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66606668 + 66606669.

It is an arithmetic number, because the mean of its divisors is an integer number (66606669).

Almost surely, 2^133213337 is an apocalyptic number.

It is an amenable number.

133213337 is a deficient number, since it is larger than the sum of its proper divisors (1).

133213337 is an equidigital number, since it uses as much as digits as its factorization.

133213337 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3402, while the sum is 26.

The square root of 133213337 is about 11541.8082205519. The cubic root of 133213337 is about 510.7196517268.

Adding to 133213337 its reverse (733312331), we get a palindrome (866525668).

The spelling of 133213337 in words is "one hundred thirty-three million, two hundred thirteen thousand, three hundred thirty-seven".