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10649 = 23463

10649 has 4 divisors (see below), whose sum is σ = 11136. Its totient is φ = 10164.

The previous prime is 10639. The next prime is 10651. The reversal of 10649 is 94601.

10649 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Cunningham number, because it is equal to 223+1.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 10649 - 212 = 6553 is a prime.

It is a super-2 number, since 2×106492 = 226802402, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 10649.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 209 + ... + 254.

It is an arithmetic number, because the mean of its divisors is an integer number (2784).

210649 is an apocalyptic number.

It is an amenable number.

10649 is a deficient number, since it is larger than the sum of its proper divisors (487).

10649 is an equidigital number, since it uses as much as digits as its factorization.

10649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 486.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 10649 is about 103.1939920732. The cubic root of 10649 is about 22.0006886837. Note that the first 3 decimals are identical.

The spelling of 10649 in words is "ten thousand, six hundred forty-nine".

Divisors: 1 23 463 10649