133643992 has 8 divisors (see below), whose sum is σ = 250582500. Its totient is φ = 66821992.

The previous prime is 133643971. The next prime is 133644011. The reversal of 133643992 is 299346331.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8352742 + ... + 8352757.

Almost surely, 2^133643992 is an apocalyptic number.

It is an amenable number.

133643992 is a deficient number, since it is larger than the sum of its proper divisors (116938508).

133643992 is a wasteful number, since it uses less digits than its factorization.

133643992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16705505 (or 16705501 counting only the distinct ones).

The product of its digits is 104976, while the sum is 40.

The square root of 133643992 is about 11560.4494722307. The cubic root of 133643992 is about 511.2694149565.

The spelling of 133643992 in words is "one hundred thirty-three million, six hundred forty-three thousand, nine hundred ninety-two".