287391313 has 8 divisors (see below), whose sum is σ = 318658176. Its totient is φ = 256981200.

The previous prime is 287391271. The next prime is 287391343. The reversal of 287391313 is 313193782.

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 287391313 - 2¹³ = 287383121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (287391343) 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, 213481 + ... + 214822.

It is an arithmetic number, because the mean of its divisors is an integer number (39832272).

Almost surely, 2^287391313 is an apocalyptic number.

It is an amenable number.

287391313 is a deficient number, since it is larger than the sum of its proper divisors (31266863).

287391313 is a wasteful number, since it uses less digits than its factorization.

287391313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428375.

The product of its digits is 27216, while the sum is 37.

The square root of 287391313 is about 16952.6196500718. The cubic root of 287391313 is about 659.9198808469.

The spelling of 287391313 in words is "two hundred eighty-seven million, three hundred ninety-one thousand, three hundred thirteen".