2172887 has 2 divisors, whose sum is σ = 2172888. Its totient is φ = 2172886.

The previous prime is 2172871. The next prime is 2172893. The reversal of 2172887 is 7882712.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2172887 - 2⁴ = 2172871 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2172817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1086443 + 1086444.

It is an arithmetic number, because the mean of its divisors is an integer number (1086444).

2^2172887 is an apocalyptic number.

2172887 is a deficient number, since it is larger than the sum of its proper divisors (1).

2172887 is an equidigital number, since it uses as much as digits as its factorization.

2172887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12544, while the sum is 35.

The square root of 2172887 is about 1474.0715722108. The cubic root of 2172887 is about 129.5226477586.

The spelling of 2172887 in words is "two million, one hundred seventy-two thousand, eight hundred eighty-seven".