11641631 has 4 divisors (see below), whose sum is σ = 11688264. Its totient is φ = 11595000.

The previous prime is 11641621. The next prime is 11641639. The reversal of 11641631 is 13614611.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11641631 - 2¹⁴ = 11625247 is a prime.

It is a super-2 number, since 2×11641631² = 271055144680322, 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 = 11641597 and 11641606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11641639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22940 + ... + 23441.

It is an arithmetic number, because the mean of its divisors is an integer number (2922066).

Almost surely, 2^11641631 is an apocalyptic number.

11641631 is a deficient number, since it is larger than the sum of its proper divisors (46633).

11641631 is an equidigital number, since it uses as much as digits as its factorization.

11641631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46632.

The product of its digits is 432, while the sum is 23.

The square root of 11641631 is about 3411.9834407570. The cubic root of 11641631 is about 226.6407210306.

The spelling of 11641631 in words is "eleven million, six hundred forty-one thousand, six hundred thirty-one".