2689768409 has 2 divisors, whose sum is σ = 2689768410. Its totient is φ = 2689768408.

The previous prime is 2689768397. The next prime is 2689768427. The reversal of 2689768409 is 9048679862.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2209282009 + 480486400 = 47003^2 + 21920^2 .

It is a cyclic number.

It is not a de Polignac number, because 2689768409 - 2⁸ = 2689768153 is a prime.

It is not a weakly prime, because it can be changed into another prime (2689768429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1344884204 + 1344884205.

It is an arithmetic number, because the mean of its divisors is an integer number (1344884205).

Almost surely, 2^2689768409 is an apocalyptic number.

It is an amenable number.

2689768409 is a deficient number, since it is larger than the sum of its proper divisors (1).

2689768409 is an equidigital number, since it uses as much as digits as its factorization.

2689768409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10450944, while the sum is 59.

The square root of 2689768409 is about 51862.9772477439. The cubic root of 2689768409 is about 1390.7155036525.

The spelling of 2689768409 in words is "two billion, six hundred eighty-nine million, seven hundred sixty-eight thousand, four hundred nine".