2169997 has 2 divisors, whose sum is σ = 2169998. Its totient is φ = 2169996.

The previous prime is 2169991. The next prime is 2170039. The reversal of 2169997 is 7999612.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1920996 + 249001 = 1386^2 + 499^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2169997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2169991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1084998 + 1084999.

It is an arithmetic number, because the mean of its divisors is an integer number (1084999).

2^2169997 is an apocalyptic number.

It is an amenable number.

2169997 is a deficient number, since it is larger than the sum of its proper divisors (1).

2169997 is an equidigital number, since it uses as much as digits as its factorization.

2169997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 61236, while the sum is 43.

The square root of 2169997 is about 1473.0909679989. The cubic root of 2169997 is about 129.4651993766.

The spelling of 2169997 in words is "two million, one hundred sixty-nine thousand, nine hundred ninety-seven".