286820641 has 2 divisors, whose sum is σ = 286820642. Its totient is φ = 286820640.

The previous prime is 286820623. The next prime is 286820647. The reversal of 286820641 is 146028682.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 199939600 + 86881041 = 14140^2 + 9321^2 .

It is a cyclic number.

It is not a de Polignac number, because 286820641 - 2⁵ = 286820609 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 286820641.

It is not a weakly prime, because it can be changed into another prime (286820647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 143410320 + 143410321.

It is an arithmetic number, because the mean of its divisors is an integer number (143410321).

Almost surely, 2^286820641 is an apocalyptic number.

It is an amenable number.

286820641 is a deficient number, since it is larger than the sum of its proper divisors (1).

286820641 is an equidigital number, since it uses as much as digits as its factorization.

286820641 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36864, while the sum is 37.

The square root of 286820641 is about 16935.7799052775. The cubic root of 286820641 is about 659.4827911528.

The spelling of 286820641 in words is "two hundred eighty-six million, eight hundred twenty thousand, six hundred forty-one".