285873481 has 2 divisors, whose sum is σ = 285873482. Its totient is φ = 285873480.

The previous prime is 285873451. The next prime is 285873491. The reversal of 285873481 is 184378582.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 272250000 + 13623481 = 16500^2 + 3691^2 .

It is a cyclic number.

It is not a de Polignac number, because 285873481 - 2²¹ = 283776329 is a prime.

It is a super-2 number, since 2×285873481² = 163447294278114722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (285873451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142936740 + 142936741.

It is an arithmetic number, because the mean of its divisors is an integer number (142936741).

Almost surely, 2^285873481 is an apocalyptic number.

It is an amenable number.

285873481 is a deficient number, since it is larger than the sum of its proper divisors (1).

285873481 is an equidigital number, since it uses as much as digits as its factorization.

285873481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 430080, while the sum is 46.

The square root of 285873481 is about 16907.7934988573. The cubic root of 285873481 is about 658.7560599164.

The spelling of 285873481 in words is "two hundred eighty-five million, eight hundred seventy-three thousand, four hundred eighty-one".