285561763 has 2 divisors, whose sum is σ = 285561764. Its totient is φ = 285561762.

The previous prime is 285561673. The next prime is 285561769. The reversal of 285561763 is 367165582.

Together with previous prime (285561673) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 285561763 - 2¹³ = 285553571 is a prime.

It is not a weakly prime, because it can be changed into another prime (285561769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142780881 + 142780882.

It is an arithmetic number, because the mean of its divisors is an integer number (142780882).

Almost surely, 2^285561763 is an apocalyptic number.

285561763 is a deficient number, since it is larger than the sum of its proper divisors (1).

285561763 is an equidigital number, since it uses as much as digits as its factorization.

285561763 is an evil number, because the sum of its binary digits is even.

The product of its digits is 302400, while the sum is 43.

The square root of 285561763 is about 16898.5728095600. The cubic root of 285561763 is about 658.5165357711.

The spelling of 285561763 in words is "two hundred eighty-five million, five hundred sixty-one thousand, seven hundred sixty-three".