285120047 has 2 divisors, whose sum is σ = 285120048. Its totient is φ = 285120046.

The previous prime is 285119987. The next prime is 285120079. The reversal of 285120047 is 740021582.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 285120047 - 2²⁰ = 284071471 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (285120247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142560023 + 142560024.

It is an arithmetic number, because the mean of its divisors is an integer number (142560024).

Almost surely, 2^285120047 is an apocalyptic number.

285120047 is a deficient number, since it is larger than the sum of its proper divisors (1).

285120047 is an equidigital number, since it uses as much as digits as its factorization.

285120047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4480, while the sum is 29.

The square root of 285120047 is about 16885.4981270912. The cubic root of 285120047 is about 658.1768224572.

The spelling of 285120047 in words is "two hundred eighty-five million, one hundred twenty thousand, forty-seven".