2399287 has 4 divisors (see below), whose sum is σ = 2617416. Its totient is φ = 2181160.

The previous prime is 2399273. The next prime is 2399297. The reversal of 2399287 is 7829932.

2399287 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2399287 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 (2399207) 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, 109048 + ... + 109069.

It is an arithmetic number, because the mean of its divisors is an integer number (654354).

2^2399287 is an apocalyptic number.

2399287 is a deficient number, since it is larger than the sum of its proper divisors (218129).

2399287 is a wasteful number, since it uses less digits than its factorization.

2399287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218128.

The product of its digits is 54432, while the sum is 40.

The square root of 2399287 is about 1548.9632016288. The cubic root of 2399287 is about 133.8733302118.

The spelling of 2399287 in words is "two million, three hundred ninety-nine thousand, two hundred eighty-seven".