289426940809 has 2 divisors, whose sum is σ = 289426940810. Its totient is φ = 289426940808.

The previous prime is 289426940807. The next prime is 289426940813. The reversal of 289426940809 is 908049624982.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 289320273225 + 106667584 = 537885^2 + 10328^2 .

It is a cyclic number.

It is not a de Polignac number, because 289426940809 - 2¹ = 289426940807 is a prime.

Together with 289426940807, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (289426940807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 144713470404 + 144713470405.

It is an arithmetic number, because the mean of its divisors is an integer number (144713470405).

Almost surely, 2^289426940809 is an apocalyptic number.

It is an amenable number.

289426940809 is a deficient number, since it is larger than the sum of its proper divisors (1).

289426940809 is an equidigital number, since it uses as much as digits as its factorization.

289426940809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17915904, while the sum is 61.

The spelling of 289426940809 in words is "two hundred eighty-nine billion, four hundred twenty-six million, nine hundred forty thousand, eight hundred nine".