2197887 has 16 divisors (see below), whose sum is σ = 3048192. Its totient is φ = 1407680.

The previous prime is 2197873. The next prime is 2197907. The reversal of 2197887 is 7887912.

It is a cyclic number.

It is not a de Polignac number, because 2197887 - 2⁷ = 2197759 is a prime.

2197887 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2197847) 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, 13078 + ... + 13244.

It is an arithmetic number, because the mean of its divisors is an integer number (190512).

2^2197887 is an apocalyptic number.

2197887 is a deficient number, since it is larger than the sum of its proper divisors (850305).

2197887 is a wasteful number, since it uses less digits than its factorization.

2197887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318.

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

The square root of 2197887 is about 1482.5272341512. The cubic root of 2197887 is about 130.0174927151.

The spelling of 2197887 in words is "two million, one hundred ninety-seven thousand, eight hundred eighty-seven".