87309223 has 2 divisors, whose sum is σ = 87309224. Its totient is φ = 87309222.

The previous prime is 87309217. The next prime is 87309253. The reversal of 87309223 is 32290378.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87309223 - 2⁵ = 87309191 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87309253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43654611 + 43654612.

It is an arithmetic number, because the mean of its divisors is an integer number (43654612).

Almost surely, 2^87309223 is an apocalyptic number.

87309223 is a deficient number, since it is larger than the sum of its proper divisors (1).

87309223 is an equidigital number, since it uses as much as digits as its factorization.

87309223 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 87309223 is about 9343.9404428753. The cubic root of 87309223 is about 443.6291153098.

The spelling of 87309223 in words is "eighty-seven million, three hundred nine thousand, two hundred twenty-three".