285947471 has 2 divisors, whose sum is σ = 285947472. Its totient is φ = 285947470.

The previous prime is 285947447. The next prime is 285947509. The reversal of 285947471 is 174749582.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-285947471 is a prime.

It is a super-3 number, since 3×285947471³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (285947401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142973735 + 142973736.

It is an arithmetic number, because the mean of its divisors is an integer number (142973736).

Almost surely, 2^285947471 is an apocalyptic number.

285947471 is a deficient number, since it is larger than the sum of its proper divisors (1).

285947471 is an equidigital number, since it uses as much as digits as its factorization.

285947471 is an evil number, because the sum of its binary digits is even.

The product of its digits is 564480, while the sum is 47.

The square root of 285947471 is about 16909.9814015273. The cubic root of 285947471 is about 658.8128882683.

The spelling of 285947471 in words is "two hundred eighty-five million, nine hundred forty-seven thousand, four hundred seventy-one".