87561133 has 8 divisors (see below), whose sum is σ = 97140960. Its totient is φ = 78251280.

The previous prime is 87561119. The next prime is 87561197. The reversal of 87561133 is 33116578.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87561133 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 (87561113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66810 + ... + 68107.

It is an arithmetic number, because the mean of its divisors is an integer number (12142620).

Almost surely, 2^87561133 is an apocalyptic number.

It is an amenable number.

87561133 is a deficient number, since it is larger than the sum of its proper divisors (9579827).

87561133 is a wasteful number, since it uses less digits than its factorization.

87561133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134987.

The product of its digits is 15120, while the sum is 34.

The square root of 87561133 is about 9357.4105926800. The cubic root of 87561133 is about 444.0553677266.

It can be divided in two parts, 8756 and 1133, that added together give a palindrome (9889).

The spelling of 87561133 in words is "eighty-seven million, five hundred sixty-one thousand, one hundred thirty-three".