285159983 has 2 divisors, whose sum is σ = 285159984. Its totient is φ = 285159982.

The previous prime is 285159977. The next prime is 285160019. The reversal of 285159983 is 389951582.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 285159983 - 2⁴ = 285159967 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (285159283) 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, 142579991 + 142579992.

It is an arithmetic number, because the mean of its divisors is an integer number (142579992).

Almost surely, 2^285159983 is an apocalyptic number.

285159983 is a deficient number, since it is larger than the sum of its proper divisors (1).

285159983 is an equidigital number, since it uses as much as digits as its factorization.

285159983 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 777600, while the sum is 50.

The square root of 285159983 is about 16886.6806388941. The cubic root of 285159983 is about 658.2075507097.

The spelling of 285159983 in words is "two hundred eighty-five million, one hundred fifty-nine thousand, nine hundred eighty-three".