11631643 has 2 divisors, whose sum is σ = 11631644. Its totient is φ = 11631642.

The previous prime is 11631637. The next prime is 11631647. The reversal of 11631643 is 34613611.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11631643 - 2⁵ = 11631611 is a prime.

It is not a weakly prime, because it can be changed into another prime (11631647) 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 as a sum of consecutive naturals, namely, 5815821 + 5815822.

It is an arithmetic number, because the mean of its divisors is an integer number (5815822).

Almost surely, 2^11631643 is an apocalyptic number.

11631643 is a deficient number, since it is larger than the sum of its proper divisors (1).

11631643 is an equidigital number, since it uses as much as digits as its factorization.

11631643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1296, while the sum is 25.

The square root of 11631643 is about 3410.5194619002. The cubic root of 11631643 is about 226.5758866097.

The spelling of 11631643 in words is "eleven million, six hundred thirty-one thousand, six hundred forty-three".