285139319 has 2 divisors, whose sum is σ = 285139320. Its totient is φ = 285139318.

The previous prime is 285139301. The next prime is 285139343. The reversal of 285139319 is 913931582.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-285139319 is a prime.

It is a super-2 number, since 2×285139319² = 162608862479567522, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (285139369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142569659 + 142569660.

It is an arithmetic number, because the mean of its divisors is an integer number (142569660).

Almost surely, 2^285139319 is an apocalyptic number.

285139319 is a deficient number, since it is larger than the sum of its proper divisors (1).

285139319 is an equidigital number, since it uses as much as digits as its factorization.

285139319 is an evil number, because the sum of its binary digits is even.

The product of its digits is 58320, while the sum is 41.

The square root of 285139319 is about 16886.0687846520. The cubic root of 285139319 is about 658.1916514132.

The spelling of 285139319 in words is "two hundred eighty-five million, one hundred thirty-nine thousand, three hundred nineteen".