87165943 has 2 divisors, whose sum is σ = 87165944. Its totient is φ = 87165942.

The previous prime is 87165917. The next prime is 87165961. The reversal of 87165943 is 34956178.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 87165943 - 2²⁵ = 53611511 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 87165943.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87165983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43582971 + 43582972.

It is an arithmetic number, because the mean of its divisors is an integer number (43582972).

Almost surely, 2^87165943 is an apocalyptic number.

87165943 is a deficient number, since it is larger than the sum of its proper divisors (1).

87165943 is an equidigital number, since it uses as much as digits as its factorization.

87165943 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 181440, while the sum is 43.

The square root of 87165943 is about 9336.2702938593. The cubic root of 87165943 is about 443.3863078889.

The spelling of 87165943 in words is "eighty-seven million, one hundred sixty-five thousand, nine hundred forty-three".