2171387 has 2 divisors, whose sum is σ = 2171388. Its totient is φ = 2171386.

The previous prime is 2171383. The next prime is 2171431. The reversal of 2171387 is 7831712.

2171387 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2171387 - 2² = 2171383 is a prime.

It is a d-powerful number, because it can be written as 2¹⁹ + 1 + 7⁷ + 1 + 3 + 8 + 7⁷ .

It is not a weakly prime, because it can be changed into another prime (2171383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1085693 + 1085694.

It is an arithmetic number, because the mean of its divisors is an integer number (1085694).

2^2171387 is an apocalyptic number.

2171387 is a deficient number, since it is larger than the sum of its proper divisors (1).

2171387 is an equidigital number, since it uses as much as digits as its factorization.

2171387 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2352, while the sum is 29.

The square root of 2171387 is about 1473.5626895385. The cubic root of 2171387 is about 129.4928366217.

The spelling of 2171387 in words is "two million, one hundred seventy-one thousand, three hundred eighty-seven".