285747457 has 2 divisors, whose sum is σ = 285747458. Its totient is φ = 285747456.

The previous prime is 285747439. The next prime is 285747461. The reversal of 285747457 is 754747582.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 235960321 + 49787136 = 15361^2 + 7056^2 .

It is a cyclic number.

It is not a de Polignac number, because 285747457 - 2²³ = 277358849 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 285747457.

It is not a weakly prime, because it can be changed into another prime (285747487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142873728 + 142873729.

It is an arithmetic number, because the mean of its divisors is an integer number (142873729).

Almost surely, 2^285747457 is an apocalyptic number.

It is an amenable number.

285747457 is a deficient number, since it is larger than the sum of its proper divisors (1).

285747457 is an equidigital number, since it uses as much as digits as its factorization.

285747457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2195200, while the sum is 49.

The square root of 285747457 is about 16904.0662859562. The cubic root of 285747457 is about 658.6592440386.

The spelling of 285747457 in words is "two hundred eighty-five million, seven hundred forty-seven thousand, four hundred fifty-seven".