133471994 has 8 divisors (see below), whose sum is σ = 200261748. Its totient is φ = 66718080.

The previous prime is 133471993. The next prime is 133471997. The reversal of 133471994 is 499174331.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 109098025 + 24373969 = 10445^2 + 4937^2 .

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

It is a super-3 number, since 3×133471994³ (a number of 25 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (133471993) 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 3 ways as a sum of consecutive naturals, for example, 4244 + ... + 16880.

Almost surely, 2^133471994 is an apocalyptic number.

133471994 is a deficient number, since it is larger than the sum of its proper divisors (66789754).

133471994 is a wasteful number, since it uses less digits than its factorization.

133471994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17920.

The product of its digits is 81648, while the sum is 41.

The square root of 133471994 is about 11553.0080065756. The cubic root of 133471994 is about 511.0499885355.

The spelling of 133471994 in words is "one hundred thirty-three million, four hundred seventy-one thousand, nine hundred ninety-four".