133171210687 has 4 divisors (see below), whose sum is σ = 133172038576. Its totient is φ = 133170382800.

The previous prime is 133171210681. The next prime is 133171210699. The reversal of 133171210687 is 786012171331.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 133171210687 - 2¹⁹ = 133170686399 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 (133171210681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86118 + ... + 523219.

It is an arithmetic number, because the mean of its divisors is an integer number (33293009644).

Almost surely, 2^133171210687 is an apocalyptic number.

133171210687 is a deficient number, since it is larger than the sum of its proper divisors (827889).

133171210687 is an equidigital number, since it uses as much as digits as its factorization.

133171210687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 827888.

The product of its (nonzero) digits is 42336, while the sum is 40.

The spelling of 133171210687 in words is "one hundred thirty-three billion, one hundred seventy-one million, two hundred ten thousand, six hundred eighty-seven".