87221323 has 6 divisors (see below), whose sum is σ = 101461596. Its totient is φ = 74761092.

The previous prime is 87221317. The next prime is 87221341. The reversal of 87221323 is 32312278.

It is not a de Polignac number, because 87221323 - 2¹³ = 87213131 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 87221291 and 87221300.

It is not an unprimeable number, because it can be changed into a prime (87221363) 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 in 5 ways as a sum of consecutive naturals, for example, 889965 + ... + 890062.

It is an arithmetic number, because the mean of its divisors is an integer number (16910266).

Almost surely, 2^87221323 is an apocalyptic number.

87221323 is a deficient number, since it is larger than the sum of its proper divisors (14240273).

87221323 is a wasteful number, since it uses less digits than its factorization.

87221323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1780041 (or 1780034 counting only the distinct ones).

The product of its digits is 4032, while the sum is 28.

The square root of 87221323 is about 9339.2356753644. The cubic root of 87221323 is about 443.4801883446.

The spelling of 87221323 in words is "eighty-seven million, two hundred twenty-one thousand, three hundred twenty-three".