285343285889 has 2 divisors, whose sum is σ = 285343285890. Its totient is φ = 285343285888.

The previous prime is 285343285807. The next prime is 285343285943. The reversal of 285343285889 is 988582343582.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 269714035600 + 15629250289 = 519340^2 + 125017^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-285343285889 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (285343281889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142671642944 + 142671642945.

It is an arithmetic number, because the mean of its divisors is an integer number (142671642945).

Almost surely, 2^285343285889 is an apocalyptic number.

It is an amenable number.

285343285889 is a deficient number, since it is larger than the sum of its proper divisors (1).

285343285889 is an equidigital number, since it uses as much as digits as its factorization.

285343285889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 132710400, while the sum is 65.

The spelling of 285343285889 in words is "two hundred eighty-five billion, three hundred forty-three million, two hundred eighty-five thousand, eight hundred eighty-nine".