87199271 has 2 divisors, whose sum is σ = 87199272. Its totient is φ = 87199270.

The previous prime is 87199253. The next prime is 87199291. The reversal of 87199271 is 17299178.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87199271 - 2⁶ = 87199207 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87199291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43599635 + 43599636.

It is an arithmetic number, because the mean of its divisors is an integer number (43599636).

Almost surely, 2^87199271 is an apocalyptic number.

87199271 is a deficient number, since it is larger than the sum of its proper divisors (1).

87199271 is an equidigital number, since it uses as much as digits as its factorization.

87199271 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 63504, while the sum is 44.

The square root of 87199271 is about 9338.0549902000. The cubic root of 87199271 is about 443.4428104456.

The spelling of 87199271 in words is "eighty-seven million, one hundred ninety-nine thousand, two hundred seventy-one".