133831973 has 8 divisors (see below), whose sum is σ = 154586880. Its totient is φ = 114508480.

The previous prime is 133831937. The next prime is 133832003. The reversal of 133831973 is 379138331.

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

It is a cyclic number.

It is not a de Polignac number, because 133831973 - 2²⁶ = 66723109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133831903) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 357653 + ... + 358026.

It is an arithmetic number, because the mean of its divisors is an integer number (19323360).

Almost surely, 2^133831973 is an apocalyptic number.

It is an amenable number.

133831973 is a deficient number, since it is larger than the sum of its proper divisors (20754907).

133831973 is a wasteful number, since it uses less digits than its factorization.

133831973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 715707.

The product of its digits is 40824, while the sum is 38.

The square root of 133831973 is about 11568.5769652105. The cubic root of 133831973 is about 511.5090164729.

The spelling of 133831973 in words is "one hundred thirty-three million, eight hundred thirty-one thousand, nine hundred seventy-three".