87028289 has 2 divisors, whose sum is σ = 87028290. Its totient is φ = 87028288.

The previous prime is 87028283. The next prime is 87028307. The reversal of 87028289 is 98282078.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59413264 + 27615025 = 7708^2 + 5255^2 .

It is a cyclic number.

It is not a de Polignac number, because 87028289 - 2²⁰ = 85979713 is a prime.

It is not a weakly prime, because it can be changed into another prime (87028283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43514144 + 43514145.

It is an arithmetic number, because the mean of its divisors is an integer number (43514145).

Almost surely, 2^87028289 is an apocalyptic number.

It is an amenable number.

87028289 is a deficient number, since it is larger than the sum of its proper divisors (1).

87028289 is an equidigital number, since it uses as much as digits as its factorization.

87028289 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 129024, while the sum is 44.

The square root of 87028289 is about 9328.8953794112. The cubic root of 87028289 is about 443.1527837488.

The spelling of 87028289 in words is "eighty-seven million, twenty-eight thousand, two hundred eighty-nine".