87194087 has 2 divisors, whose sum is σ = 87194088. Its totient is φ = 87194086.

The previous prime is 87194083. The next prime is 87194099. The reversal of 87194087 is 78049178.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87194087 - 2² = 87194083 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87194083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43597043 + 43597044.

It is an arithmetic number, because the mean of its divisors is an integer number (43597044).

Almost surely, 2^87194087 is an apocalyptic number.

87194087 is a deficient number, since it is larger than the sum of its proper divisors (1).

87194087 is an equidigital number, since it uses as much as digits as its factorization.

87194087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 112896, while the sum is 44.

The square root of 87194087 is about 9337.7774122111. Note that the first 3 decimals coincide. The cubic root of 87194087 is about 443.4340227074.

The spelling of 87194087 in words is "eighty-seven million, one hundred ninety-four thousand, eighty-seven".