285139343 has 2 divisors, whose sum is σ = 285139344. Its totient is φ = 285139342.

The previous prime is 285139319. The next prime is 285139367. The reversal of 285139343 is 343931582.

It is a balanced prime because it is at equal distance from previous prime (285139319) and next prime (285139367).

It is a cyclic number.

It is not a de Polignac number, because 285139343 - 2⁸ = 285139087 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 285139297 and 285139306.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (285139843) 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, 142569671 + 142569672.

It is an arithmetic number, because the mean of its divisors is an integer number (142569672).

Almost surely, 2^285139343 is an apocalyptic number.

285139343 is a deficient number, since it is larger than the sum of its proper divisors (1).

285139343 is an equidigital number, since it uses as much as digits as its factorization.

285139343 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 77760, while the sum is 38.

The square root of 285139343 is about 16886.0694952970. The cubic root of 285139343 is about 658.1916698797.

The spelling of 285139343 in words is "two hundred eighty-five million, one hundred thirty-nine thousand, three hundred forty-three".