2689343621 has 2 divisors, whose sum is σ = 2689343622. Its totient is φ = 2689343620.

The previous prime is 2689343617. The next prime is 2689343633. The reversal of 2689343621 is 1263439862.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2414248225 + 275095396 = 49135^2 + 16586^2 .

It is a cyclic number.

It is not a de Polignac number, because 2689343621 - 2² = 2689343617 is a prime.

It is a super-2 number, since 2×2689343621² = 14465138223626783282, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2689343641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1344671810 + 1344671811.

It is an arithmetic number, because the mean of its divisors is an integer number (1344671811).

Almost surely, 2^2689343621 is an apocalyptic number.

It is an amenable number.

2689343621 is a deficient number, since it is larger than the sum of its proper divisors (1).

2689343621 is an equidigital number, since it uses as much as digits as its factorization.

2689343621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 373248, while the sum is 44.

The square root of 2689343621 is about 51858.8817947321. The cubic root of 2689343621 is about 1390.6422891263.

The spelling of 2689343621 in words is "two billion, six hundred eighty-nine million, three hundred forty-three thousand, six hundred twenty-one".