87021223 has 2 divisors, whose sum is σ = 87021224. Its totient is φ = 87021222.

The previous prime is 87021211. The next prime is 87021227. The reversal of 87021223 is 32212078.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 87021223 - 2²¹ = 84924071 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87021227) 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, 43510611 + 43510612.

It is an arithmetic number, because the mean of its divisors is an integer number (43510612).

Almost surely, 2^87021223 is an apocalyptic number.

87021223 is a deficient number, since it is larger than the sum of its proper divisors (1).

87021223 is an equidigital number, since it uses as much as digits as its factorization.

87021223 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 87021223 is about 9328.5166559320. The cubic root of 87021223 is about 443.1407899387.

The spelling of 87021223 in words is "eighty-seven million, twenty-one thousand, two hundred twenty-three".