870724289 has 2 divisors, whose sum is σ = 870724290. Its totient is φ = 870724288.

The previous prime is 870724259. The next prime is 870724313. The reversal of 870724289 is 982427078.

It is a happy number.

870724289 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 764799025 + 105925264 = 27655^2 + 10292^2 .

It is a cyclic number.

It is not a de Polignac number, because 870724289 - 2¹⁶ = 870658753 is a prime.

It is not a weakly prime, because it can be changed into another prime (870724259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 435362144 + 435362145.

It is an arithmetic number, because the mean of its divisors is an integer number (435362145).

Almost surely, 2^870724289 is an apocalyptic number.

It is an amenable number.

870724289 is a deficient number, since it is larger than the sum of its proper divisors (1).

870724289 is an equidigital number, since it uses as much as digits as its factorization.

870724289 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 451584, while the sum is 47.

The square root of 870724289 is about 29508.0377016161. The cubic root of 870724289 is about 954.9051152497.

The spelling of 870724289 in words is "eight hundred seventy million, seven hundred twenty-four thousand, two hundred eighty-nine".