285257083 has 2 divisors, whose sum is σ = 285257084. Its totient is φ = 285257082.

The previous prime is 285257069. The next prime is 285257117. The reversal of 285257083 is 380752582.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 285257083 - 2¹³ = 285248891 is a prime.

It is equal to p_15495961 and since 285257083 and 15495961 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (285237083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142628541 + 142628542.

It is an arithmetic number, because the mean of its divisors is an integer number (142628542).

Almost surely, 2^285257083 is an apocalyptic number.

285257083 is a deficient number, since it is larger than the sum of its proper divisors (1).

285257083 is an equidigital number, since it uses as much as digits as its factorization.

285257083 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 134400, while the sum is 40.

The square root of 285257083 is about 16889.5554411595. Note that the first 3 decimals coincide. The cubic root of 285257083 is about 658.2822511167.

The spelling of 285257083 in words is "two hundred eighty-five million, two hundred fifty-seven thousand, eighty-three".