87822271 has 2 divisors, whose sum is σ = 87822272. Its totient is φ = 87822270.

The previous prime is 87822247. The next prime is 87822277. The reversal of 87822271 is 17222878.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 87822271 - 2⁷ = 87822143 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 87822271.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87822277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43911135 + 43911136.

It is an arithmetic number, because the mean of its divisors is an integer number (43911136).

Almost surely, 2^87822271 is an apocalyptic number.

87822271 is a deficient number, since it is larger than the sum of its proper divisors (1).

87822271 is an equidigital number, since it uses as much as digits as its factorization.

87822271 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25088, while the sum is 37.

The square root of 87822271 is about 9371.3537442570. The cubic root of 87822271 is about 444.4963725414.

The spelling of 87822271 in words is "eighty-seven million, eight hundred twenty-two thousand, two hundred seventy-one".