87288239 has 2 divisors, whose sum is σ = 87288240. Its totient is φ = 87288238.

The previous prime is 87288233. The next prime is 87288307. The reversal of 87288239 is 93288278.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87288239 - 2²⁰ = 86239663 is a prime.

It is a super-2 number, since 2×87288239² = 15238473335442242, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 87288193 and 87288202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87288233) 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, 43644119 + 43644120.

It is an arithmetic number, because the mean of its divisors is an integer number (43644120).

Almost surely, 2^87288239 is an apocalyptic number.

87288239 is a deficient number, since it is larger than the sum of its proper divisors (1).

87288239 is an equidigital number, since it uses as much as digits as its factorization.

87288239 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 387072, while the sum is 47.

The square root of 87288239 is about 9342.8175086534. The cubic root of 87288239 is about 443.5935716833.

The spelling of 87288239 in words is "eighty-seven million, two hundred eighty-eight thousand, two hundred thirty-nine".