285040747 has 2 divisors, whose sum is σ = 285040748. Its totient is φ = 285040746.

The previous prime is 285040729. The next prime is 285040757. The reversal of 285040747 is 747040582.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 285040747 - 2⁷ = 285040619 is a prime.

It is not a weakly prime, because it can be changed into another prime (285040757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142520373 + 142520374.

It is an arithmetic number, because the mean of its divisors is an integer number (142520374).

Almost surely, 2^285040747 is an apocalyptic number.

285040747 is a deficient number, since it is larger than the sum of its proper divisors (1).

285040747 is an equidigital number, since it uses as much as digits as its factorization.

285040747 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 62720, while the sum is 37.

The square root of 285040747 is about 16883.1497949879. The cubic root of 285040747 is about 658.1157975636.

The spelling of 285040747 in words is "two hundred eighty-five million, forty thousand, seven hundred forty-seven".