2691197 has 2 divisors, whose sum is σ = 2691198. Its totient is φ = 2691196.

The previous prime is 2691193. The next prime is 2691209. The reversal of 2691197 is 7911962.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2033476 + 657721 = 1426^2 + 811^2 .

It is a cyclic number.

It is not a de Polignac number, because 2691197 - 2² = 2691193 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2691191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1345598 + 1345599.

It is an arithmetic number, because the mean of its divisors is an integer number (1345599).

2^2691197 is an apocalyptic number.

It is an amenable number.

2691197 is a deficient number, since it is larger than the sum of its proper divisors (1).

2691197 is an equidigital number, since it uses as much as digits as its factorization.

2691197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6804, while the sum is 35.

The square root of 2691197 is about 1640.4868179903. The cubic root of 2691197 is about 139.0961672556.

The spelling of 2691197 in words is "two million, six hundred ninety-one thousand, one hundred ninety-seven".