102840289 has 2 divisors, whose sum is σ = 102840290. Its totient is φ = 102840288.

The previous prime is 102840281. The next prime is 102840329. The reversal of 102840289 is 982048201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 88209664 + 14630625 = 9392^2 + 3825^2 .

It is a cyclic number.

It is not a de Polignac number, because 102840289 - 2³ = 102840281 is a prime.

It is a super-2 number, since 2×102840289² = 21152250083207042, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (102840281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51420144 + 51420145.

It is an arithmetic number, because the mean of its divisors is an integer number (51420145).

Almost surely, 2^102840289 is an apocalyptic number.

It is an amenable number.

102840289 is a deficient number, since it is larger than the sum of its proper divisors (1).

102840289 is an equidigital number, since it uses as much as digits as its factorization.

102840289 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9216, while the sum is 34.

The square root of 102840289 is about 10141.0201163394. The cubic root of 102840289 is about 468.5124069053.

The spelling of 102840289 in words is "one hundred two million, eight hundred forty thousand, two hundred eighty-nine".