285503947 has 2 divisors, whose sum is σ = 285503948. Its totient is φ = 285503946.

The previous prime is 285503941. The next prime is 285503989. The reversal of 285503947 is 749305582.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-285503947 is a prime.

It is not a weakly prime, because it can be changed into another prime (285503941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142751973 + 142751974.

It is an arithmetic number, because the mean of its divisors is an integer number (142751974).

Almost surely, 2^285503947 is an apocalyptic number.

285503947 is a deficient number, since it is larger than the sum of its proper divisors (1).

285503947 is an equidigital number, since it uses as much as digits as its factorization.

285503947 is an evil number, because the sum of its binary digits is even.

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

The square root of 285503947 is about 16896.8620459540. The cubic root of 285503947 is about 658.4720907897.

The spelling of 285503947 in words is "two hundred eighty-five million, five hundred three thousand, nine hundred forty-seven".