10640449 has 2 divisors, whose sum is σ = 10640450. Its totient is φ = 10640448.

The previous prime is 10640429. The next prime is 10640489. The reversal of 10640449 is 94404601.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10608049 + 32400 = 3257^2 + 180^2 .

It is an emirp because it is prime and its reverse (94404601) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 10640449 - 2⁷ = 10640321 is a prime.

It is a super-2 number, since 2×10640449² = 226438309843202, which contains 22 as substring.

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

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5320224 + 5320225.

It is an arithmetic number, because the mean of its divisors is an integer number (5320225).

Almost surely, 2^10640449 is an apocalyptic number.

It is an amenable number.

10640449 is a deficient number, since it is larger than the sum of its proper divisors (1).

10640449 is an equidigital number, since it uses as much as digits as its factorization.

10640449 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 10640449 is about 3261.9701102248. The cubic root of 10640449 is about 219.9479835701.

The spelling of 10640449 in words is "ten million, six hundred forty thousand, four hundred forty-nine".