11663631 has 12 divisors (see below), whose sum is σ = 19254352. Its totient is φ = 6664896.

The previous prime is 11663611. The next prime is 11663633. The reversal of 11663631 is 13636611.

It is a happy number.

It is not a de Polignac number, because 11663631 - 2⁷ = 11663503 is a prime.

It is a super-2 number, since 2×11663631² = 272080576208322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11663595 and 11663604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11663633) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 92506 + ... + 92631.

Almost surely, 2^11663631 is an apocalyptic number.

11663631 is a deficient number, since it is larger than the sum of its proper divisors (7590721).

11663631 is a wasteful number, since it uses less digits than its factorization.

11663631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185150 (or 185147 counting only the distinct ones).

The product of its digits is 1944, while the sum is 27.

The square root of 11663631 is about 3415.2058503112. The cubic root of 11663631 is about 226.7833974390.

The spelling of 11663631 in words is "eleven million, six hundred sixty-three thousand, six hundred thirty-one".