285240947 has 2 divisors, whose sum is σ = 285240948. Its totient is φ = 285240946.

The previous prime is 285240929. The next prime is 285240997. The reversal of 285240947 is 749042582.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 285240947 - 2⁶ = 285240883 is a prime.

It is not a weakly prime, because it can be changed into another prime (285240997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142620473 + 142620474.

It is an arithmetic number, because the mean of its divisors is an integer number (142620474).

Almost surely, 2^285240947 is an apocalyptic number.

285240947 is a deficient number, since it is larger than the sum of its proper divisors (1).

285240947 is an equidigital number, since it uses as much as digits as its factorization.

285240947 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 161280, while the sum is 41.

The square root of 285240947 is about 16889.0777427307. The cubic root of 285240947 is about 658.2698386376.

The spelling of 285240947 in words is "two hundred eighty-five million, two hundred forty thousand, nine hundred forty-seven".