286620121 has 2 divisors, whose sum is σ = 286620122. Its totient is φ = 286620120.

The previous prime is 286620109. The next prime is 286620157. The reversal of 286620121 is 121026682.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 210250000 + 76370121 = 14500^2 + 8739^2 .

It is a cyclic number.

It is not a de Polignac number, because 286620121 - 2²¹ = 284522969 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 286620121.

It is not a weakly prime, because it can be changed into another prime (286620421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 143310060 + 143310061.

It is an arithmetic number, because the mean of its divisors is an integer number (143310061).

Almost surely, 2^286620121 is an apocalyptic number.

It is an amenable number.

286620121 is a deficient number, since it is larger than the sum of its proper divisors (1).

286620121 is an equidigital number, since it uses as much as digits as its factorization.

286620121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 286620121 is about 16929.8588594235. The cubic root of 286620121 is about 659.3290710235.

The spelling of 286620121 in words is "two hundred eighty-six million, six hundred twenty thousand, one hundred twenty-one".