2686631 has 2 divisors, whose sum is σ = 2686632. Its totient is φ = 2686630.

The previous prime is 2686603. The next prime is 2686667. The reversal of 2686631 is 1366862.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2686631 - 2¹⁰ = 2685607 is a prime.

It is a super-2 number, since 2×2686631² = 14435972260322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2680631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1343315 + 1343316.

It is an arithmetic number, because the mean of its divisors is an integer number (1343316).

2^2686631 is an apocalyptic number.

2686631 is a deficient number, since it is larger than the sum of its proper divisors (1).

2686631 is an equidigital number, since it uses as much as digits as its factorization.

2686631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10368, while the sum is 32.

The square root of 2686631 is about 1639.0945671315. The cubic root of 2686631 is about 139.0174572212.

The spelling of 2686631 in words is "two million, six hundred eighty-six thousand, six hundred thirty-one".