133681003 has 2 divisors, whose sum is σ = 133681004. Its totient is φ = 133681002.

The previous prime is 133680997. The next prime is 133681043. The reversal of 133681003 is 300186331.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 133681003 - 2⁵ = 133680971 is a prime.

It is a super-2 number, since 2×133681003² = 35741221126172018, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (133681043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66840501 + 66840502.

It is an arithmetic number, because the mean of its divisors is an integer number (66840502).

Almost surely, 2^133681003 is an apocalyptic number.

133681003 is a deficient number, since it is larger than the sum of its proper divisors (1).

133681003 is an equidigital number, since it uses as much as digits as its factorization.

133681003 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 133681003 is about 11562.0501209777. The cubic root of 133681003 is about 511.3166071160.

The spelling of 133681003 in words is "one hundred thirty-three million, six hundred eighty-one thousand, three".