133847864 has 8 divisors (see below), whose sum is σ = 250964760. Its totient is φ = 66923928.

The previous prime is 133847827. The next prime is 133847867. The reversal of 133847864 is 468748331.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133847867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8365484 + ... + 8365499.

It is an arithmetic number, because the mean of its divisors is an integer number (31370595).

Almost surely, 2^133847864 is an apocalyptic number.

It is an amenable number.

133847864 is a deficient number, since it is larger than the sum of its proper divisors (117116896).

133847864 is a wasteful number, since it uses less digits than its factorization.

133847864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16730989 (or 16730985 counting only the distinct ones).

The product of its digits is 387072, while the sum is 44.

The square root of 133847864 is about 11569.2637622279. The cubic root of 133847864 is about 511.5292609329.

The spelling of 133847864 in words is "one hundred thirty-three million, eight hundred forty-seven thousand, eight hundred sixty-four".