285100889 has 2 divisors, whose sum is σ = 285100890. Its totient is φ = 285100888.

The previous prime is 285100867. The next prime is 285100891. The reversal of 285100889 is 988001582.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 279993289 + 5107600 = 16733^2 + 2260^2 .

It is a cyclic number.

It is not a de Polignac number, because 285100889 - 2¹² = 285096793 is a prime.

Together with 285100891, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (285100819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142550444 + 142550445.

It is an arithmetic number, because the mean of its divisors is an integer number (142550445).

Almost surely, 2^285100889 is an apocalyptic number.

It is an amenable number.

285100889 is a deficient number, since it is larger than the sum of its proper divisors (1).

285100889 is an equidigital number, since it uses as much as digits as its factorization.

285100889 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46080, while the sum is 41.

The square root of 285100889 is about 16884.9308260354. The cubic root of 285100889 is about 658.1620805568.

The spelling of 285100889 in words is "two hundred eighty-five million, one hundred thousand, eight hundred eighty-nine".