11009631 has 8 divisors (see below), whose sum is σ = 14697520. Its totient is φ = 7330752.

The previous prime is 11009629. The next prime is 11009639. The reversal of 11009631 is 13690011.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11009631 - 2¹ = 11009629 is a prime.

It is a super-2 number, since 2×11009631² = 242423949512322, 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 = 11009598 and 11009607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11009639) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1491 + ... + 4923.

It is an arithmetic number, because the mean of its divisors is an integer number (1837190).

Almost surely, 2^11009631 is an apocalyptic number.

11009631 is a deficient number, since it is larger than the sum of its proper divisors (3687889).

11009631 is a wasteful number, since it uses less digits than its factorization.

11009631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4505.

The product of its (nonzero) digits is 162, while the sum is 21.

The square root of 11009631 is about 3318.0764005671. The cubic root of 11009631 is about 222.4628966452.

Adding to 11009631 its reverse (13690011), we get a palindrome (24699642).

It can be divided in two parts, 1100 and 9631, that added together give a triangular number (10731 = T₁₄₆).

The spelling of 11009631 in words is "eleven million, nine thousand, six hundred thirty-one".