10640489 has 2 divisors, whose sum is σ = 10640490. Its totient is φ = 10640488.

The previous prime is 10640449. The next prime is 10640491. The reversal of 10640489 is 98404601.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8508889 + 2131600 = 2917^2 + 1460^2 .

It is a cyclic number.

It is not a de Polignac number, because 10640489 - 2⁸ = 10640233 is a prime.

It is a super-2 number, since 2×10640489² = 226440012318242, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 10640491, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (10640429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5320244 + 5320245.

It is an arithmetic number, because the mean of its divisors is an integer number (5320245).

Almost surely, 2^10640489 is an apocalyptic number.

It is an amenable number.

10640489 is a deficient number, since it is larger than the sum of its proper divisors (1).

10640489 is an equidigital number, since it uses as much as digits as its factorization.

10640489 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 10640489 is about 3261.9762414831. The cubic root of 10640489 is about 219.9482591821.

The spelling of 10640489 in words is "ten million, six hundred forty thousand, four hundred eighty-nine".