9783649 has 2 divisors, whose sum is σ = 9783650. Its totient is φ = 9783648.

The previous prime is 9783647. The next prime is 9783659. The reversal of 9783649 is 9463879.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7879249 + 1904400 = 2807^2 + 1380^2 .

It is a cyclic number.

It is not a de Polignac number, because 9783649 - 2¹ = 9783647 is a prime.

Together with 9783647, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 9783599 and 9783608.

It is not a weakly prime, because it can be changed into another prime (9783647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4891824 + 4891825.

It is an arithmetic number, because the mean of its divisors is an integer number (4891825).

Almost surely, 2^9783649 is an apocalyptic number.

It is an amenable number.

9783649 is a deficient number, since it is larger than the sum of its proper divisors (1).

9783649 is an equidigital number, since it uses as much as digits as its factorization.

9783649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 326592, while the sum is 46.

The square root of 9783649 is about 3127.8825105812. The cubic root of 9783649 is about 213.8784137696.

The spelling of 9783649 in words is "nine million, seven hundred eighty-three thousand, six hundred forty-nine".