285343281889 has 2 divisors, whose sum is σ = 285343281890. Its totient is φ = 285343281888.

The previous prime is 285343281833. The next prime is 285343281917. The reversal of 285343281889 is 988182343582.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 272671952400 + 12671329489 = 522180^2 + 112567^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-285343281889 is a prime.

It is not a weakly prime, because it can be changed into another prime (285343281809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142671640944 + 142671640945.

It is an arithmetic number, because the mean of its divisors is an integer number (142671640945).

Almost surely, 2^285343281889 is an apocalyptic number.

It is an amenable number.

285343281889 is a deficient number, since it is larger than the sum of its proper divisors (1).

285343281889 is an equidigital number, since it uses as much as digits as its factorization.

285343281889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26542080, while the sum is 61.

The spelling of 285343281889 in words is "two hundred eighty-five billion, three hundred forty-three million, two hundred eighty-one thousand, eight hundred eighty-nine".