2691449297 has 2 divisors, whose sum is σ = 2691449298. Its totient is φ = 2691449296.

The previous prime is 2691449291. The next prime is 2691449347. The reversal of 2691449297 is 7929441962.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1661296081 + 1030153216 = 40759^2 + 32096^2 .

It is a cyclic number.

It is not a de Polignac number, because 2691449297 - 2¹⁰ = 2691448273 is a prime.

It is not a weakly prime, because it can be changed into another prime (2691449291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1345724648 + 1345724649.

It is an arithmetic number, because the mean of its divisors is an integer number (1345724649).

Almost surely, 2^2691449297 is an apocalyptic number.

It is an amenable number.

2691449297 is a deficient number, since it is larger than the sum of its proper divisors (1).

2691449297 is an equidigital number, since it uses as much as digits as its factorization.

2691449297 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1959552, while the sum is 53.

The square root of 2691449297 is about 51879.1798026916. The cubic root of 2691449297 is about 1391.0051382815.

The spelling of 2691449297 in words is "two billion, six hundred ninety-one million, four hundred forty-nine thousand, two hundred ninety-seven".