133973247 has 12 divisors (see below), whose sum is σ = 181724120. Its totient is φ = 87794832.

The previous prime is 133973239. The next prime is 133973261. The reversal of 133973247 is 742379331.

It is not a de Polignac number, because 133973247 - 2³ = 133973239 is a prime.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133973647) by changing a digit.

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 in 11 ways as a sum of consecutive naturals, for example, 4029 + ... + 16857.

Almost surely, 2^133973247 is an apocalyptic number.

133973247 is a deficient number, since it is larger than the sum of its proper divisors (47750873).

133973247 is an equidigital number, since it uses as much as digits as its factorization.

133973247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12950 (or 12891 counting only the distinct ones).

The product of its digits is 95256, while the sum is 39.

The square root of 133973247 is about 11574.6812915086. The cubic root of 133973247 is about 511.6889373866.

The spelling of 133973247 in words is "one hundred thirty-three million, nine hundred seventy-three thousand, two hundred forty-seven".