133881697 has 2 divisors, whose sum is σ = 133881698. Its totient is φ = 133881696.

The previous prime is 133881691. The next prime is 133881767. The reversal of 133881697 is 796188331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67963536 + 65918161 = 8244^2 + 8119^2 .

It is a cyclic number.

It is not a de Polignac number, because 133881697 - 2¹⁵ = 133848929 is a prime.

It is not a weakly prime, because it can be changed into another prime (133881691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66940848 + 66940849.

It is an arithmetic number, because the mean of its divisors is an integer number (66940849).

Almost surely, 2^133881697 is an apocalyptic number.

It is an amenable number.

133881697 is a deficient number, since it is larger than the sum of its proper divisors (1).

133881697 is an equidigital number, since it uses as much as digits as its factorization.

133881697 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 217728, while the sum is 46.

The square root of 133881697 is about 11570.7258631427. The cubic root of 133881697 is about 511.5723574032.

The spelling of 133881697 in words is "one hundred thirty-three million, eight hundred eighty-one thousand, six hundred ninety-seven".