287238113 has 2 divisors, whose sum is σ = 287238114. Its totient is φ = 287238112.

The previous prime is 287238109. The next prime is 287238187. The reversal of 287238113 is 311832782.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 240343009 + 46895104 = 15503^2 + 6848^2 .

It is a cyclic number.

It is not a de Polignac number, because 287238113 - 2² = 287238109 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (287138113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 143619056 + 143619057.

It is an arithmetic number, because the mean of its divisors is an integer number (143619057).

Almost surely, 2^287238113 is an apocalyptic number.

It is an amenable number.

287238113 is a deficient number, since it is larger than the sum of its proper divisors (1).

287238113 is an equidigital number, since it uses as much as digits as its factorization.

287238113 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16128, while the sum is 35.

The square root of 287238113 is about 16948.1005720405. The cubic root of 287238113 is about 659.8025986015.

The spelling of 287238113 in words is "two hundred eighty-seven million, two hundred thirty-eight thousand, one hundred thirteen".