133493 has 2 divisors, whose sum is σ = 133494. Its totient is φ = 133492.

The previous prime is 133481. The next prime is 133499. The reversal of 133493 is 394331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 128164 + 5329 = 358^2 + 73^2 .

It is a cyclic number.

It is not a de Polignac number, because 133493 - 2¹⁰ = 132469 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66746 + 66747.

It is an arithmetic number, because the mean of its divisors is an integer number (66747).

2¹³³⁴⁹³ is an apocalyptic number.

It is an amenable number.

133493 is a deficient number, since it is larger than the sum of its proper divisors (1).

133493 is an equidigital number, since it uses as much as digits as its factorization.

133493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 972, while the sum is 23.

The square root of 133493 is about 365.3669388437. The cubic root of 133493 is about 51.1076797038.

It can be divided in two parts, 133 and 493, that added together give a palindrome (626).

The spelling of 133493 in words is "one hundred thirty-three thousand, four hundred ninety-three".