133531946 has 8 divisors (see below), whose sum is σ = 202363140. Its totient is φ = 66077568.

The previous prime is 133531939. The next prime is 133532011. The reversal of 133531946 is 649135331.

It can be written as a sum of positive squares in 2 ways, for example, as 127938721 + 5593225 = 11311^2 + 2365^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-4 number, since 4×133531946⁴ (a number of 34 digits) contains 4444 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 343961 + ... + 344348.

Almost surely, 2^133531946 is an apocalyptic number.

133531946 is a deficient number, since it is larger than the sum of its proper divisors (68831194).

133531946 is an equidigital number, since it uses as much as digits as its factorization.

133531946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 688408.

The product of its digits is 29160, while the sum is 35.

The square root of 133531946 is about 11555.6023642214. The cubic root of 133531946 is about 511.1264936804.

The spelling of 133531946 in words is "one hundred thirty-three million, five hundred thirty-one thousand, nine hundred forty-six".