287883481 has 2 divisors, whose sum is σ = 287883482. Its totient is φ = 287883480.

The previous prime is 287883371. The next prime is 287883529. The reversal of 287883481 is 184388782.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 271755225 + 16128256 = 16485^2 + 4016^2 .

It is a cyclic number.

It is not a de Polignac number, because 287883481 - 2⁷ = 287883353 is a prime.

It is a super-2 number, since 2×287883481² = 165753797265354722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (287886481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 143941740 + 143941741.

It is an arithmetic number, because the mean of its divisors is an integer number (143941741).

Almost surely, 2^287883481 is an apocalyptic number.

It is an amenable number.

287883481 is a deficient number, since it is larger than the sum of its proper divisors (1).

287883481 is an equidigital number, since it uses as much as digits as its factorization.

287883481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 688128, while the sum is 49.

The square root of 287883481 is about 16967.1294272190. The cubic root of 287883481 is about 660.2963782145.

The spelling of 287883481 in words is "two hundred eighty-seven million, eight hundred eighty-three thousand, four hundred eighty-one".