287913213 has 48 divisors (see below), whose sum is σ = 516505600. Its totient is φ = 150815520.

The previous prime is 287913203. The next prime is 287913217. The reversal of 287913213 is 312319782.

It is not a de Polignac number, because 287913213 - 2⁵ = 287913181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (287913217) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 33228 + ... + 40986.

Almost surely, 2^287913213 is an apocalyptic number.

It is an amenable number.

287913213 is a deficient number, since it is larger than the sum of its proper divisors (228592387).

287913213 is a wasteful number, since it uses less digits than its factorization.

287913213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7822 (or 7819 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 287913213 is about 16968.0055693060. The cubic root of 287913213 is about 660.3191087720.

The spelling of 287913213 in words is "two hundred eighty-seven million, nine hundred thirteen thousand, two hundred thirteen".