133469447 has 4 divisors (see below), whose sum is σ = 133527840. Its totient is φ = 133411056.

The previous prime is 133469429. The next prime is 133469449. The reversal of 133469447 is 744964331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 744964331 = 19 ⋅39208649.

It is a cyclic number.

It is not a de Polignac number, because 133469447 - 2⁸ = 133469191 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 (133469449) 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, 25622 + ... + 30387.

It is an arithmetic number, because the mean of its divisors is an integer number (33381960).

Almost surely, 2^133469447 is an apocalyptic number.

133469447 is a deficient number, since it is larger than the sum of its proper divisors (58393).

133469447 is an equidigital number, since it uses as much as digits as its factorization.

133469447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58392.

The product of its digits is 217728, while the sum is 41.

The square root of 133469447 is about 11552.8977750173. The cubic root of 133469447 is about 511.0467377846.

The spelling of 133469447 in words is "one hundred thirty-three million, four hundred sixty-nine thousand, four hundred forty-seven".