2163387 has 4 divisors (see below), whose sum is σ = 2884520. Its totient is φ = 1442256.

The previous prime is 2163361. The next prime is 2163401. The reversal of 2163387 is 7833612.

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

It is not a de Polignac number, because 2163387 - 2¹² = 2159291 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2163307) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 360562 + ... + 360567.

It is an arithmetic number, because the mean of its divisors is an integer number (721130).

2^2163387 is an apocalyptic number.

2163387 is a deficient number, since it is larger than the sum of its proper divisors (721133).

2163387 is an equidigital number, since it uses as much as digits as its factorization.

2163387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 721132.

The product of its digits is 6048, while the sum is 30.

The square root of 2163387 is about 1470.8456751135. The cubic root of 2163387 is about 129.3336115829. Note that the first 3 decimals are identical.

Adding to 2163387 its reverse (7833612), we get a palindrome (9996999).

The spelling of 2163387 in words is "two million, one hundred sixty-three thousand, three hundred eighty-seven".