133217669 has 4 divisors (see below), whose sum is σ = 143465196. Its totient is φ = 122970144.

The previous prime is 133217663. The next prime is 133217713. The reversal of 133217669 is 966712331.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 966712331 = 13 ⋅74362487.

It can be written as a sum of positive squares in 2 ways, for example, as 50225569 + 82992100 = 7087^2 + 9110^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133217669 is a prime.

It is a super-2 number, since 2×133217669² = 35493894667587122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133217663) 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, 5123744 + ... + 5123769.

It is an arithmetic number, because the mean of its divisors is an integer number (35866299).

Almost surely, 2^133217669 is an apocalyptic number.

It is an amenable number.

133217669 is a deficient number, since it is larger than the sum of its proper divisors (10247527).

133217669 is a wasteful number, since it uses less digits than its factorization.

133217669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10247526.

The product of its digits is 40824, while the sum is 38.

The square root of 133217669 is about 11541.9958845947. The cubic root of 133217669 is about 510.7251877429.

The spelling of 133217669 in words is "one hundred thirty-three million, two hundred seventeen thousand, six hundred sixty-nine".