11626681 has 4 divisors (see below), whose sum is σ = 12683664. Its totient is φ = 10569700.

The previous prime is 11626673. The next prime is 11626721. The reversal of 11626681 is 18662611.

11626681 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: 18662611 = 11 ⋅1696601.

It is a cyclic number.

It is not a de Polignac number, because 11626681 - 2³ = 11626673 is a prime.

It is a super-2 number, since 2×11626681² = 270359422151522, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11626781) 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, 528475 + ... + 528496.

It is an arithmetic number, because the mean of its divisors is an integer number (3170916).

Almost surely, 2^11626681 is an apocalyptic number.

11626681 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11626681 is a deficient number, since it is larger than the sum of its proper divisors (1056983).

11626681 is a wasteful number, since it uses less digits than its factorization.

11626681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1056982.

The product of its digits is 3456, while the sum is 31.

The square root of 11626681 is about 3409.7919291359. The cubic root of 11626681 is about 226.5436633186.

The spelling of 11626681 in words is "eleven million, six hundred twenty-six thousand, six hundred eighty-one".