133665473 has 4 divisors (see below), whose sum is σ = 133827540. Its totient is φ = 133503408.

The previous prime is 133665463. The next prime is 133665479. The reversal of 133665473 is 374566331.

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 34304449 + 99361024 = 5857^2 + 9968^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133665473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133665479) 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, 79790 + ... + 81447.

It is an arithmetic number, because the mean of its divisors is an integer number (33456885).

Almost surely, 2^133665473 is an apocalyptic number.

It is an amenable number.

133665473 is a deficient number, since it is larger than the sum of its proper divisors (162067).

133665473 is an equidigital number, since it uses as much as digits as its factorization.

133665473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162066.

The product of its digits is 136080, while the sum is 38.

The square root of 133665473 is about 11561.3785077732. The cubic root of 133665473 is about 511.2968061115.

The spelling of 133665473 in words is "one hundred thirty-three million, six hundred sixty-five thousand, four hundred seventy-three".