2197697 has 2 divisors, whose sum is σ = 2197698. Its totient is φ = 2197696.

The previous prime is 2197693. The next prime is 2197703. The reversal of 2197697 is 7967912.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2163841 + 33856 = 1471^2 + 184^2 .

It is a cyclic number.

It is not a de Polignac number, because 2197697 - 2² = 2197693 is a prime.

It is not a weakly prime, because it can be changed into another prime (2197693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1098848 + 1098849.

It is an arithmetic number, because the mean of its divisors is an integer number (1098849).

2^2197697 is an apocalyptic number.

It is an amenable number.

2197697 is a deficient number, since it is larger than the sum of its proper divisors (1).

2197697 is an equidigital number, since it uses as much as digits as its factorization.

2197697 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 47628, while the sum is 41.

The square root of 2197697 is about 1482.4631529991. The cubic root of 2197697 is about 130.0137460810.

Subtracting from 2197697 its sum of digits (41), we obtain a triangular number (2197656 = T₂₀₉₆).

The spelling of 2197697 in words is "two million, one hundred ninety-seven thousand, six hundred ninety-seven".