285731863 has 2 divisors, whose sum is σ = 285731864. Its totient is φ = 285731862.

The previous prime is 285731857. The next prime is 285731893. The reversal of 285731863 is 368137582.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 285731863 - 2⁹ = 285731351 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (285731843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142865931 + 142865932.

It is an arithmetic number, because the mean of its divisors is an integer number (142865932).

Almost surely, 2^285731863 is an apocalyptic number.

285731863 is a deficient number, since it is larger than the sum of its proper divisors (1).

285731863 is an equidigital number, since it uses as much as digits as its factorization.

285731863 is an evil number, because the sum of its binary digits is even.

The product of its digits is 241920, while the sum is 43.

The square root of 285731863 is about 16903.6050296971. The cubic root of 285731863 is about 658.6472622240.

The spelling of 285731863 in words is "two hundred eighty-five million, seven hundred thirty-one thousand, eight hundred sixty-three".