2187897 has 16 divisors (see below), whose sum is σ = 3041280. Its totient is φ = 1398032.

The previous prime is 2187877. The next prime is 2187901. The reversal of 2187897 is 7987812.

It is a cyclic number.

It is not a de Polignac number, because 2187897 - 2⁶ = 2187833 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2187817) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8188 + ... + 8450.

It is an arithmetic number, because the mean of its divisors is an integer number (190080).

2^2187897 is an apocalyptic number.

It is an amenable number.

2187897 is a deficient number, since it is larger than the sum of its proper divisors (853383).

2187897 is a wasteful number, since it uses less digits than its factorization.

2187897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 372.

The product of its digits is 56448, while the sum is 42.

The square root of 2187897 is about 1479.1541501818. The cubic root of 2187897 is about 129.8202051004.

The spelling of 2187897 in words is "two million, one hundred eighty-seven thousand, eight hundred ninety-seven".