287140313 has 8 divisors (see below), whose sum is σ = 295116360. Its totient is φ = 279175680.

The previous prime is 287140307. The next prime is 287140327. The reversal of 287140313 is 313041782.

It can be written as a sum of positive squares in 4 ways, for example, as 185695129 + 101445184 = 13627^2 + 10072^2 .

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 287140313 - 2⁴ = 287140297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (287140363) 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, 83753 + ... + 87113.

It is an arithmetic number, because the mean of its divisors is an integer number (36889545).

Almost surely, 2^287140313 is an apocalyptic number.

It is an amenable number.

287140313 is a deficient number, since it is larger than the sum of its proper divisors (7976047).

287140313 is a wasteful number, since it uses less digits than its factorization.

287140313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5707.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 287140313 is about 16945.2150473224. The cubic root of 287140313 is about 659.7277060109.

The spelling of 287140313 in words is "two hundred eighty-seven million, one hundred forty thousand, three hundred thirteen".