2187399 has 8 divisors (see below), whose sum is σ = 2964592. Its totient is φ = 1434240.

The previous prime is 2187397. The next prime is 2187421. The reversal of 2187399 is 9937812.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2187399 - 2¹ = 2187397 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 (2187397) 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, 5794 + ... + 6159.

It is an arithmetic number, because the mean of its divisors is an integer number (370574).

2^2187399 is an apocalyptic number.

2187399 is a deficient number, since it is larger than the sum of its proper divisors (777193).

2187399 is a wasteful number, since it uses less digits than its factorization.

2187399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12017.

The product of its digits is 27216, while the sum is 39.

The square root of 2187399 is about 1478.9858011489. The cubic root of 2187399 is about 129.8103546416.

The spelling of 2187399 in words is "two million, one hundred eighty-seven thousand, three hundred ninety-nine".