87284231 has 2 divisors, whose sum is σ = 87284232. Its totient is φ = 87284230.

The previous prime is 87284213. The next prime is 87284237. The reversal of 87284231 is 13248278.

Together with previous prime (87284213) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 87284231 - 2¹⁴ = 87267847 is a prime.

It is a super-2 number, since 2×87284231² = 15237073962522722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 87284191 and 87284200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87284237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43642115 + 43642116.

It is an arithmetic number, because the mean of its divisors is an integer number (43642116).

Almost surely, 2^87284231 is an apocalyptic number.

87284231 is a deficient number, since it is larger than the sum of its proper divisors (1).

87284231 is an equidigital number, since it uses as much as digits as its factorization.

87284231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21504, while the sum is 35.

The square root of 87284231 is about 9342.6030098683. The cubic root of 87284231 is about 443.5867821079.

The spelling of 87284231 in words is "eighty-seven million, two hundred eighty-four thousand, two hundred thirty-one".