2897131409 has 2 divisors, whose sum is σ = 2897131410. Its totient is φ = 2897131408.

The previous prime is 2897131379. The next prime is 2897131411. The reversal of 2897131409 is 9041317982.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2897130625 + 784 = 53825^2 + 28^2 .

It is a cyclic number.

It is not a de Polignac number, because 2897131409 - 2¹² = 2897127313 is a prime.

Together with 2897131411, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2897131409.

It is not a weakly prime, because it can be changed into another prime (2897131439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1448565704 + 1448565705.

It is an arithmetic number, because the mean of its divisors is an integer number (1448565705).

Almost surely, 2^2897131409 is an apocalyptic number.

It is an amenable number.

2897131409 is a deficient number, since it is larger than the sum of its proper divisors (1).

2897131409 is an equidigital number, since it uses as much as digits as its factorization.

2897131409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108864, while the sum is 44.

The square root of 2897131409 is about 53825.0072828606. The cubic root of 2897131409 is about 1425.5727926494.

The spelling of 2897131409 in words is "two billion, eight hundred ninety-seven million, one hundred thirty-one thousand, four hundred nine".