289270789981 has 2 divisors, whose sum is σ = 289270789982. Its totient is φ = 289270789980.

The previous prime is 289270789963. The next prime is 289270790027. The reversal of 289270789981 is 189987072982.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 193365990756 + 95904799225 = 439734^2 + 309685^2 .

It is a cyclic number.

It is not a de Polignac number, because 289270789981 - 2¹¹ = 289270787933 is a prime.

It is a super-2 number, since 2×289270789981² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 289270789981.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (289270789081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 144635394990 + 144635394991.

It is an arithmetic number, because the mean of its divisors is an integer number (144635394991).

Almost surely, 2^289270789981 is an apocalyptic number.

It is an amenable number.

289270789981 is a deficient number, since it is larger than the sum of its proper divisors (1).

289270789981 is an equidigital number, since it uses as much as digits as its factorization.

289270789981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 73156608, while the sum is 70.

The spelling of 289270789981 in words is "two hundred eighty-nine billion, two hundred seventy million, seven hundred eighty-nine thousand, nine hundred eighty-one".