2693681 has 4 divisors (see below), whose sum is σ = 2713200. Its totient is φ = 2674164.

The previous prime is 2693671. The next prime is 2693707. The reversal of 2693681 is 1863962.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1863962 = 2 ⋅931981.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2693681 is a prime.

It is a super-2 number, since 2×2693681² = 14511834659522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2693651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9551 + ... + 9828.

It is an arithmetic number, because the mean of its divisors is an integer number (678300).

2^2693681 is an apocalyptic number.

It is an amenable number.

2693681 is a deficient number, since it is larger than the sum of its proper divisors (19519).

2693681 is a wasteful number, since it uses less digits than its factorization.

2693681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19518.

The product of its digits is 15552, while the sum is 35.

The square root of 2693681 is about 1641.2437357078. The cubic root of 2693681 is about 139.1389497831.

The spelling of 2693681 in words is "two million, six hundred ninety-three thousand, six hundred eighty-one".