287263873 has 8 divisors (see below), whose sum is σ = 309633128. Its totient is φ = 264933504.

The previous prime is 287263853. The next prime is 287263901. The reversal of 287263873 is 378362782.

It can be written as a sum of positive squares in 4 ways, for example, as 15904144 + 271359729 = 3988^2 + 16473^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 287263873 - 2²⁵ = 253709441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (287263843) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6661 + ... + 24877.

It is an arithmetic number, because the mean of its divisors is an integer number (38704141).

Almost surely, 2^287263873 is an apocalyptic number.

It is an amenable number.

287263873 is a deficient number, since it is larger than the sum of its proper divisors (22369255).

287263873 is a wasteful number, since it uses less digits than its factorization.

287263873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19443.

The product of its digits is 677376, while the sum is 46.

The square root of 287263873 is about 16948.8605221708. The cubic root of 287263873 is about 659.8223220830.

The spelling of 287263873 in words is "two hundred eighty-seven million, two hundred sixty-three thousand, eight hundred seventy-three".