133490213 has 4 divisors (see below), whose sum is σ = 133515180. Its totient is φ = 133465248.

The previous prime is 133490131. The next prime is 133490221. The reversal of 133490213 is 312094331.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 86731969 + 46758244 = 9313^2 + 6838^2 .

It is a cyclic number.

It is not a de Polignac number, because 133490213 - 2¹⁶ = 133424677 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133490113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 848 + ... + 16361.

It is an arithmetic number, because the mean of its divisors is an integer number (33378795).

Almost surely, 2^133490213 is an apocalyptic number.

It is an amenable number.

133490213 is a deficient number, since it is larger than the sum of its proper divisors (24967).

133490213 is an equidigital number, since it uses as much as digits as its factorization.

133490213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24966.

The product of its (nonzero) digits is 1944, while the sum is 26.

The square root of 133490213 is about 11553.7964756179. The cubic root of 133490213 is about 511.0732403450.

The spelling of 133490213 in words is "one hundred thirty-three million, four hundred ninety thousand, two hundred thirteen".