289890557989 has 2 divisors, whose sum is σ = 289890557990. Its totient is φ = 289890557988.

The previous prime is 289890557987. The next prime is 289890557993. The reversal of 289890557989 is 989755098982.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 229281041889 + 60609516100 = 478833^2 + 246190^2 .

It is a cyclic number.

It is not a de Polignac number, because 289890557989 - 2¹ = 289890557987 is a prime.

It is a super-2 number, since 2×289890557989² (a number of 24 digits) contains 22 as substring.

Together with 289890557987, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (289890557981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 144945278994 + 144945278995.

It is an arithmetic number, because the mean of its divisors is an integer number (144945278995).

Almost surely, 2^289890557989 is an apocalyptic number.

It is an amenable number.

289890557989 is a deficient number, since it is larger than the sum of its proper divisors (1).

289890557989 is an equidigital number, since it uses as much as digits as its factorization.

289890557989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1175731200, while the sum is 79.

The spelling of 289890557989 in words is "two hundred eighty-nine billion, eight hundred ninety million, five hundred fifty-seven thousand, nine hundred eighty-nine".