2691764197 has 2 divisors, whose sum is σ = 2691764198. Its totient is φ = 2691764196.

The previous prime is 2691764177. The next prime is 2691764227. The reversal of 2691764197 is 7914671962.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1757789476 + 933974721 = 41926^2 + 30561^2 .

It is a cyclic number.

It is not a de Polignac number, because 2691764197 - 2¹⁹ = 2691239909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2691764107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1345882098 + 1345882099.

It is an arithmetic number, because the mean of its divisors is an integer number (1345882099).

Almost surely, 2^2691764197 is an apocalyptic number.

It is an amenable number.

2691764197 is a deficient number, since it is larger than the sum of its proper divisors (1).

2691764197 is an equidigital number, since it uses as much as digits as its factorization.

2691764197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1143072, while the sum is 52.

The square root of 2691764197 is about 51882.2146501091. The cubic root of 2691764197 is about 1391.0593854408.

The spelling of 2691764197 in words is "two billion, six hundred ninety-one million, seven hundred sixty-four thousand, one hundred ninety-seven".