87909271 has 2 divisors, whose sum is σ = 87909272. Its totient is φ = 87909270.

The previous prime is 87909229. The next prime is 87909281. The reversal of 87909271 is 17290978.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 87909271 - 2⁹ = 87908759 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87909281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43954635 + 43954636.

It is an arithmetic number, because the mean of its divisors is an integer number (43954636).

Almost surely, 2^87909271 is an apocalyptic number.

87909271 is a deficient number, since it is larger than the sum of its proper divisors (1).

87909271 is an equidigital number, since it uses as much as digits as its factorization.

87909271 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 63504, while the sum is 43.

The square root of 87909271 is about 9375.9944005956. The cubic root of 87909271 is about 444.6431022994.

The spelling of 87909271 in words is "eighty-seven million, nine hundred nine thousand, two hundred seventy-one".