10631809 has 2 divisors, whose sum is σ = 10631810. Its totient is φ = 10631808.

The previous prime is 10631807. The next prime is 10631821. The reversal of 10631809 is 90813601.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9591409 + 1040400 = 3097^2 + 1020^2 .

It is a cyclic number.

It is not a de Polignac number, because 10631809 - 2¹ = 10631807 is a prime.

It is a super-2 number, since 2×10631809² = 226070725224962, which contains 22 as substring.

Together with 10631807, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (10631801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5315904 + 5315905.

It is an arithmetic number, because the mean of its divisors is an integer number (5315905).

Almost surely, 2^10631809 is an apocalyptic number.

It is an amenable number.

10631809 is a deficient number, since it is larger than the sum of its proper divisors (1).

10631809 is an equidigital number, since it uses as much as digits as its factorization.

10631809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 10631809 is about 3260.6454882431. The cubic root of 10631809 is about 219.8884351691. Note that the first 3 decimals are identical.

The spelling of 10631809 in words is "ten million, six hundred thirty-one thousand, eight hundred nine".