11667631 has 2 divisors, whose sum is σ = 11667632. Its totient is φ = 11667630.

The previous prime is 11667629. The next prime is 11667637. The reversal of 11667631 is 13676611.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11667631 - 2¹ = 11667629 is a prime.

It is a super-2 number, since 2×11667631² = 272267226304322, which contains 22 as substring.

Together with 11667629, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 11667593 and 11667602.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11667637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5833815 + 5833816.

It is an arithmetic number, because the mean of its divisors is an integer number (5833816).

Almost surely, 2^11667631 is an apocalyptic number.

11667631 is a deficient number, since it is larger than the sum of its proper divisors (1).

11667631 is an equidigital number, since it uses as much as digits as its factorization.

11667631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4536, while the sum is 31.

The square root of 11667631 is about 3415.7914163485. The cubic root of 11667631 is about 226.8093193242.

The spelling of 11667631 in words is "eleven million, six hundred sixty-seven thousand, six hundred thirty-one".