11689631 has 2 divisors, whose sum is σ = 11689632. Its totient is φ = 11689630.

The previous prime is 11689621. The next prime is 11689649. The reversal of 11689631 is 13698611.

It is a weak prime.

It is an emirp because it is prime and its reverse (13698611) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11689631 is a prime.

It is a super-2 number, since 2×11689631² = 273294945832322, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 11689591 and 11689600.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11689621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5844815 + 5844816.

It is an arithmetic number, because the mean of its divisors is an integer number (5844816).

Almost surely, 2^11689631 is an apocalyptic number.

11689631 is a deficient number, since it is larger than the sum of its proper divisors (1).

11689631 is an equidigital number, since it uses as much as digits as its factorization.

11689631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7776, while the sum is 35.

The square root of 11689631 is about 3419.0102368961. The cubic root of 11689631 is about 226.9517838947.

The spelling of 11689631 in words is "eleven million, six hundred eighty-nine thousand, six hundred thirty-one".