289948861913 has 2 divisors, whose sum is σ = 289948861914. Its totient is φ = 289948861912.

The previous prime is 289948861897. The next prime is 289948861931. The reversal of 289948861913 is 319168849982.

Together with next prime (289948861931) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 269165891344 + 20782970569 = 518812^2 + 144163^2 .

It is a cyclic number.

It is not a de Polignac number, because 289948861913 - 2⁴ = 289948861897 is a prime.

It is not a weakly prime, because it can be changed into another prime (289948861933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 144974430956 + 144974430957.

It is an arithmetic number, because the mean of its divisors is an integer number (144974430957).

Almost surely, 2^289948861913 is an apocalyptic number.

It is an amenable number.

289948861913 is a deficient number, since it is larger than the sum of its proper divisors (1).

289948861913 is an equidigital number, since it uses as much as digits as its factorization.

289948861913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 53747712, while the sum is 68.

The spelling of 289948861913 in words is "two hundred eighty-nine billion, nine hundred forty-eight million, eight hundred sixty-one thousand, nine hundred thirteen".