133442473 has 2 divisors, whose sum is σ = 133442474. Its totient is φ = 133442472.

The previous prime is 133442471. The next prime is 133442501. The reversal of 133442473 is 374244331.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 125619264 + 7823209 = 11208^2 + 2797^2 .

It is an emirp because it is prime and its reverse (374244331) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 133442473 - 2¹ = 133442471 is a prime.

Together with 133442471, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (133442471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66721236 + 66721237.

It is an arithmetic number, because the mean of its divisors is an integer number (66721237).

Almost surely, 2^133442473 is an apocalyptic number.

It is an amenable number.

133442473 is a deficient number, since it is larger than the sum of its proper divisors (1).

133442473 is an equidigital number, since it uses as much as digits as its factorization.

133442473 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24192, while the sum is 31.

The square root of 133442473 is about 11551.7303032922. The cubic root of 133442473 is about 511.0123081736.

The spelling of 133442473 in words is "one hundred thirty-three million, four hundred forty-two thousand, four hundred seventy-three".