289911989965 has 8 divisors (see below), whose sum is σ = 374655494808. Its totient is φ = 214088854080.

The previous prime is 289911989951. The next prime is 289911989977. The reversal of 289911989965 is 569989119982.

It can be written as a sum of positive squares in 4 ways, for example, as 1228222116 + 288683767849 = 35046^2 + 537293^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 289911989965 - 2³⁵ = 255552251597 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 289911989891 and 289911989900.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2230092166 + ... + 2230092295.

It is an arithmetic number, because the mean of its divisors is an integer number (46831936851).

Almost surely, 2^289911989965 is an apocalyptic number.

It is an amenable number.

289911989965 is a deficient number, since it is larger than the sum of its proper divisors (84743504843).

289911989965 is a wasteful number, since it uses less digits than its factorization.

289911989965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4460184479.

The product of its digits is 226748160, while the sum is 76.

The spelling of 289911989965 in words is "two hundred eighty-nine billion, nine hundred eleven million, nine hundred eighty-nine thousand, nine hundred sixty-five".