133021373 has 2 divisors, whose sum is σ = 133021374. Its totient is φ = 133021372.

The previous prime is 133021321. The next prime is 133021387. The reversal of 133021373 is 373120331.

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., 131859289 + 1162084 = 11483^2 + 1078^2 .

It is a cyclic number.

It is not a de Polignac number, because 133021373 - 2¹⁸ = 132759229 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133021393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66510686 + 66510687.

It is an arithmetic number, because the mean of its divisors is an integer number (66510687).

Almost surely, 2^133021373 is an apocalyptic number.

It is an amenable number.

133021373 is a deficient number, since it is larger than the sum of its proper divisors (1).

133021373 is an equidigital number, since it uses as much as digits as its factorization.

133021373 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1134, while the sum is 23.

The square root of 133021373 is about 11533.4891945152. The cubic root of 133021373 is about 510.4742135451.

The spelling of 133021373 in words is "one hundred thirty-three million, twenty-one thousand, three hundred seventy-three".