2175997 has 2 divisors, whose sum is σ = 2175998. Its totient is φ = 2175996.

The previous prime is 2175991. The next prime is 2176033. The reversal of 2175997 is 7995712.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2042041 + 133956 = 1429^2 + 366^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2175997 is a prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2175991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1087998 + 1087999.

It is an arithmetic number, because the mean of its divisors is an integer number (1087999).

2^2175997 is an apocalyptic number.

It is an amenable number.

2175997 is a deficient number, since it is larger than the sum of its proper divisors (1).

2175997 is an equidigital number, since it uses as much as digits as its factorization.

2175997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 39690, while the sum is 40.

The square root of 2175997 is about 1475.1260963050. The cubic root of 2175997 is about 129.5844124994.

The spelling of 2175997 in words is "two million, one hundred seventy-five thousand, nine hundred ninety-seven".