87936217 has 2 divisors, whose sum is σ = 87936218. Its totient is φ = 87936216.

The previous prime is 87936203. The next prime is 87936221. The reversal of 87936217 is 71263978.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63936016 + 24000201 = 7996^2 + 4899^2 .

It is a cyclic number.

It is not a de Polignac number, because 87936217 - 2¹⁵ = 87903449 is a prime.

It is not a weakly prime, because it can be changed into another prime (87936287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43968108 + 43968109.

It is an arithmetic number, because the mean of its divisors is an integer number (43968109).

Almost surely, 2^87936217 is an apocalyptic number.

It is an amenable number.

87936217 is a deficient number, since it is larger than the sum of its proper divisors (1).

87936217 is an equidigital number, since it uses as much as digits as its factorization.

87936217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 127008, while the sum is 43.

The square root of 87936217 is about 9377.4312580792. The cubic root of 87936217 is about 444.6885284110.

The spelling of 87936217 in words is "eighty-seven million, nine hundred thirty-six thousand, two hundred seventeen".