133443967 has 8 divisors (see below), whose sum is σ = 136838576. Its totient is φ = 130090752.

The previous prime is 133443929. The next prime is 133443979. The reversal of 133443967 is 769344331.

It is a happy number.

133443967 is nontrivially palindromic in base 8.

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-133443967 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 (133443917) 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, 3768 + ... + 16765.

It is an arithmetic number, because the mean of its divisors is an integer number (17104822).

Almost surely, 2^133443967 is an apocalyptic number.

133443967 is a deficient number, since it is larger than the sum of its proper divisors (3394609).

133443967 is an equidigital number, since it uses as much as digits as its factorization.

133443967 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20697.

The product of its digits is 163296, while the sum is 40.

The square root of 133443967 is about 11551.7949687484. The cubic root of 133443967 is about 511.0142152364.

The spelling of 133443967 in words is "one hundred thirty-three million, four hundred forty-three thousand, nine hundred sixty-seven".