133506493 has 2 divisors, whose sum is σ = 133506494. Its totient is φ = 133506492.

The previous prime is 133506479. The next prime is 133506551. The reversal of 133506493 is 394605331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 76685049 + 56821444 = 8757^2 + 7538^2 .

It is an emirp because it is prime and its reverse (394605331) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133506493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133506433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66753246 + 66753247.

It is an arithmetic number, because the mean of its divisors is an integer number (66753247).

Almost surely, 2^133506493 is an apocalyptic number.

It is an amenable number.

133506493 is a deficient number, since it is larger than the sum of its proper divisors (1).

133506493 is an equidigital number, since it uses as much as digits as its factorization.

133506493 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 29160, while the sum is 34.

The square root of 133506493 is about 11554.5009844649. The cubic root of 133506493 is about 511.0940157361.

The spelling of 133506493 in words is "one hundred thirty-three million, five hundred six thousand, four hundred ninety-three".