2686133981 has 2 divisors, whose sum is σ = 2686133982. Its totient is φ = 2686133980.

The previous prime is 2686133971. The next prime is 2686134001. The reversal of 2686133981 is 1893316862.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2483527225 + 202606756 = 49835^2 + 14234^2 .

It is a cyclic number.

It is not a de Polignac number, because 2686133981 - 2¹⁴ = 2686117597 is a prime.

It is a super-2 number, since 2×2686133981² = 14430631527765816722, 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 (2686133951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1343066990 + 1343066991.

It is an arithmetic number, because the mean of its divisors is an integer number (1343066991).

Almost surely, 2^2686133981 is an apocalyptic number.

It is an amenable number.

2686133981 is a deficient number, since it is larger than the sum of its proper divisors (1).

2686133981 is an equidigital number, since it uses as much as digits as its factorization.

2686133981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 373248, while the sum is 47.

The square root of 2686133981 is about 51827.9266515650. The cubic root of 2686133981 is about 1390.0888408272.

The spelling of 2686133981 in words is "two billion, six hundred eighty-six million, one hundred thirty-three thousand, nine hundred eighty-one".