11690681 has 4 divisors (see below), whose sum is σ = 12306000. Its totient is φ = 11075364.

The previous prime is 11690677. The next prime is 11690717. The reversal of 11690681 is 18609611.

11690681 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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: 18609611 = 17 ⋅1094683.

It is a cyclic number.

It is not a de Polignac number, because 11690681 - 2² = 11690677 is a prime.

It is a super-2 number, since 2×11690681² = 273344044487522, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (11690881) 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, 307631 + ... + 307668.

It is an arithmetic number, because the mean of its divisors is an integer number (3076500).

Almost surely, 2^11690681 is an apocalyptic number.

It is an amenable number.

11690681 is a deficient number, since it is larger than the sum of its proper divisors (615319).

11690681 is an equidigital number, since it uses as much as digits as its factorization.

11690681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 615318.

The product of its (nonzero) digits is 2592, while the sum is 32.

The square root of 11690681 is about 3419.1637866590. The cubic root of 11690681 is about 226.9585788693.

The spelling of 11690681 in words is "eleven million, six hundred ninety thousand, six hundred eighty-one".