2686381 has 2 divisors, whose sum is σ = 2686382. Its totient is φ = 2686380.

The previous prime is 2686373. The next prime is 2686393. The reversal of 2686381 is 1836862.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1550025 + 1136356 = 1245^2 + 1066^2 .

It is a cyclic number.

It is not a de Polignac number, because 2686381 - 2³ = 2686373 is a prime.

It is a super-2 number, since 2×2686381² = 14433285754322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2686781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1343190 + 1343191.

It is an arithmetic number, because the mean of its divisors is an integer number (1343191).

2^2686381 is an apocalyptic number.

It is an amenable number.

2686381 is a deficient number, since it is larger than the sum of its proper divisors (1).

2686381 is an equidigital number, since it uses as much as digits as its factorization.

2686381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13824, while the sum is 34.

The square root of 2686381 is about 1639.0183037416. The cubic root of 2686381 is about 139.0131450743.

The spelling of 2686381 in words is "two million, six hundred eighty-six thousand, three hundred eighty-one".