2686993 has 2 divisors, whose sum is σ = 2686994. Its totient is φ = 2686992.

The previous prime is 2686979. The next prime is 2687023. The reversal of 2686993 is 3996862.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1882384 + 804609 = 1372^2 + 897^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2686993 is a prime.

It is not a weakly prime, because it can be changed into another prime (2686913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1343496 + 1343497.

It is an arithmetic number, because the mean of its divisors is an integer number (1343497).

2^2686993 is an apocalyptic number.

It is an amenable number.

2686993 is a deficient number, since it is larger than the sum of its proper divisors (1).

2686993 is an equidigital number, since it uses as much as digits as its factorization.

2686993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 139968, while the sum is 43.

The square root of 2686993 is about 1639.2049902315. The cubic root of 2686993 is about 139.0237007358.

It can be divided in two parts, 26869 and 93, that added together give a palindrome (26962).

The spelling of 2686993 in words is "two million, six hundred eighty-six thousand, nine hundred ninety-three".