285947447 has 2 divisors, whose sum is σ = 285947448. Its totient is φ = 285947446.

The previous prime is 285947401. The next prime is 285947471. The reversal of 285947447 is 744749582.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 285947447 - 2¹² = 285943351 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 285947395 and 285947404.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (285947147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142973723 + 142973724.

It is an arithmetic number, because the mean of its divisors is an integer number (142973724).

Almost surely, 2^285947447 is an apocalyptic number.

285947447 is a deficient number, since it is larger than the sum of its proper divisors (1).

285947447 is an equidigital number, since it uses as much as digits as its factorization.

285947447 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2257920, while the sum is 50.

The square root of 285947447 is about 16909.9806918873. The cubic root of 285947447 is about 658.8128698366.

The spelling of 285947447 in words is "two hundred eighty-five million, nine hundred forty-seven thousand, four hundred forty-seven".