133673 has 2 divisors, whose sum is σ = 133674. Its totient is φ = 133672.

The previous prime is 133669. The next prime is 133691. The reversal of 133673 is 376331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 94864 + 38809 = 308^2 + 197^2 .

It is a cyclic number.

It is not a de Polignac number, because 133673 - 2² = 133669 is a prime.

It is not a weakly prime, because it can be changed into another prime (133633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66836 + 66837.

It is an arithmetic number, because the mean of its divisors is an integer number (66837).

2¹³³⁶⁷³ is an apocalyptic number.

It is an amenable number.

133673 is a deficient number, since it is larger than the sum of its proper divisors (1).

133673 is an equidigital number, since it uses as much as digits as its factorization.

133673 is an evil number, because the sum of its binary digits is even.

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

The square root of 133673 is about 365.6131835697. The cubic root of 133673 is about 51.1306403351.

The spelling of 133673 in words is "one hundred thirty-three thousand, six hundred seventy-three".