133678673 has 2 divisors, whose sum is σ = 133678674. Its totient is φ = 133678672.

The previous prime is 133678591. The next prime is 133678681. The reversal of 133678673 is 376876331.

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., 116273089 + 17405584 = 10783^2 + 4172^2 .

It is a cyclic number.

It is not a de Polignac number, because 133678673 - 2¹² = 133674577 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (133678073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66839336 + 66839337.

It is an arithmetic number, because the mean of its divisors is an integer number (66839337).

Almost surely, 2^133678673 is an apocalyptic number.

It is an amenable number.

133678673 is a deficient number, since it is larger than the sum of its proper divisors (1).

133678673 is an equidigital number, since it uses as much as digits as its factorization.

133678673 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 381024, while the sum is 44.

The square root of 133678673 is about 11561.9493598614. The cubic root of 133678673 is about 511.3136364256.

The spelling of 133678673 in words is "one hundred thirty-three million, six hundred seventy-eight thousand, six hundred seventy-three".