87007181 has 2 divisors, whose sum is σ = 87007182. Its totient is φ = 87007180.

The previous prime is 87007171. The next prime is 87007211. The reversal of 87007181 is 18170078.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44222500 + 42784681 = 6650^2 + 6541^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87007181 is a prime.

It is a super-2 number, since 2×87007181² = 15140499091133522, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87007171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43503590 + 43503591.

It is an arithmetic number, because the mean of its divisors is an integer number (43503591).

Almost surely, 2^87007181 is an apocalyptic number.

It is an amenable number.

87007181 is a deficient number, since it is larger than the sum of its proper divisors (1).

87007181 is an equidigital number, since it uses as much as digits as its factorization.

87007181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3136, while the sum is 32.

The square root of 87007181 is about 9327.7639871515. The cubic root of 87007181 is about 443.1169531569.

The spelling of 87007181 in words is "eighty-seven million, seven thousand, one hundred eighty-one".