133709969 has 8 divisors (see below), whose sum is σ = 135796032. Its totient is φ = 131629680.

The previous prime is 133709963. The next prime is 133709993. The reversal of 133709969 is 969907331.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133709969 is a prime.

It is a super-2 number, since 2×133709969² = 35756711619961922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133709963) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76742 + ... + 78464.

It is an arithmetic number, because the mean of its divisors is an integer number (16974504).

Almost surely, 2^133709969 is an apocalyptic number.

It is an amenable number.

133709969 is a deficient number, since it is larger than the sum of its proper divisors (2086063).

133709969 is a wasteful number, since it uses less digits than its factorization.

133709969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2887.

The product of its (nonzero) digits is 275562, while the sum is 47.

The square root of 133709969 is about 11563.3026856517. The cubic root of 133709969 is about 511.3535351435.

The spelling of 133709969 in words is "one hundred thirty-three million, seven hundred nine thousand, nine hundred sixty-nine".