87465181 has 2 divisors, whose sum is σ = 87465182. Its totient is φ = 87465180.

The previous prime is 87465179. The next prime is 87465193. The reversal of 87465181 is 18156478.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69572281 + 17892900 = 8341^2 + 4230^2 .

It is a cyclic number.

It is not a de Polignac number, because 87465181 - 2¹ = 87465179 is a prime.

It is a super-2 number, since 2×87465181² = 15300315774725522, which contains 22 as substring.

Together with 87465179, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87465881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43732590 + 43732591.

It is an arithmetic number, because the mean of its divisors is an integer number (43732591).

Almost surely, 2^87465181 is an apocalyptic number.

It is an amenable number.

87465181 is a deficient number, since it is larger than the sum of its proper divisors (1).

87465181 is an equidigital number, since it uses as much as digits as its factorization.

87465181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 53760, while the sum is 40.

The square root of 87465181 is about 9352.2821279087. The cubic root of 87465181 is about 443.8931055739.

The spelling of 87465181 in words is "eighty-seven million, four hundred sixty-five thousand, one hundred eighty-one".