2117389 has 2 divisors, whose sum is σ = 2117390. Its totient is φ = 2117388.

The previous prime is 2117369. The next prime is 2117411. The reversal of 2117389 is 9837112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2079364 + 38025 = 1442^2 + 195^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2117389 is a prime.

It is a d-powerful number, because it can be written as 2⁷ + 1 + 1 + 7³ + 3⁹ + 8⁷ + 9² .

It is a self number, because there is not a number n which added to its sum of digits gives 2117389.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2117369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1058694 + 1058695.

It is an arithmetic number, because the mean of its divisors is an integer number (1058695).

2^2117389 is an apocalyptic number.

It is an amenable number.

2117389 is a deficient number, since it is larger than the sum of its proper divisors (1).

2117389 is an equidigital number, since it uses as much as digits as its factorization.

2117389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3024, while the sum is 31.

The square root of 2117389 is about 1455.1250805343. The cubic root of 2117389 is about 128.4104055322.

The spelling of 2117389 in words is "two million, one hundred seventeen thousand, three hundred eighty-nine".