287338249 has 4 divisors (see below), whose sum is σ = 313459920. Its totient is φ = 261216580.

The previous prime is 287338229. The next prime is 287338253. The reversal of 287338249 is 942833782.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 287338249 - 2¹¹ = 287336201 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 287338199 and 287338208.

It is not an unprimeable number, because it can be changed into a prime (287338229) 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 in 3 ways as a sum of consecutive naturals, for example, 13060819 + ... + 13060840.

It is an arithmetic number, because the mean of its divisors is an integer number (78364980).

Almost surely, 2^287338249 is an apocalyptic number.

It is an amenable number.

287338249 is a deficient number, since it is larger than the sum of its proper divisors (26121671).

287338249 is a wasteful number, since it uses less digits than its factorization.

287338249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26121670.

The product of its digits is 580608, while the sum is 46.

The square root of 287338249 is about 16951.0545099708. The cubic root of 287338249 is about 659.8792624259.

The spelling of 287338249 in words is "two hundred eighty-seven million, three hundred thirty-eight thousand, two hundred forty-nine".