9640609723 has 2 divisors, whose sum is σ = 9640609724. Its totient is φ = 9640609722.

The previous prime is 9640609669. The next prime is 9640609787. The reversal of 9640609723 is 3279060469.

9640609723 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9640609723 is a prime.

It is not a weakly prime, because it can be changed into another prime (9640679723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4820304861 + 4820304862.

It is an arithmetic number, because the mean of its divisors is an integer number (4820304862).

Almost surely, 2^9640609723 is an apocalyptic number.

9640609723 is a deficient number, since it is larger than the sum of its proper divisors (1).

9640609723 is an equidigital number, since it uses as much as digits as its factorization.

9640609723 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 489888, while the sum is 46.

The square root of 9640609723 is about 98186.6066375654. The cubic root of 9640609723 is about 2128.3097468817.

The spelling of 9640609723 in words is "nine billion, six hundred forty million, six hundred nine thousand, seven hundred twenty-three".