87797181 has 8 divisors (see below), whose sum is σ = 121099680. Its totient is φ = 56513072.

The previous prime is 87797159. The next prime is 87797191. The reversal of 87797181 is 18179778.

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 87797181 - 2¹⁰ = 87796157 is a prime.

It is a super-3 number, since 3×87797181³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 87797181.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87797131) 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, 504495 + ... + 504668.

It is an arithmetic number, because the mean of its divisors is an integer number (15137460).

Almost surely, 2^87797181 is an apocalyptic number.

It is an amenable number.

87797181 is a deficient number, since it is larger than the sum of its proper divisors (33302499).

87797181 is a wasteful number, since it uses less digits than its factorization.

87797181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1009195.

The product of its digits is 197568, while the sum is 48.

The square root of 87797181 is about 9370.0149946518. The cubic root of 87797181 is about 444.4540390267.

It can be divided in two parts, 87797 and 181, that added together give a palindrome (87978).

The spelling of 87797181 in words is "eighty-seven million, seven hundred ninety-seven thousand, one hundred eighty-one".