9640739 has 2 divisors, whose sum is σ = 9640740. Its totient is φ = 9640738.

The previous prime is 9640727. The next prime is 9640811. The reversal of 9640739 is 9370469.

It is a weak prime.

It is an emirp because it is prime and its reverse (9370469) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9640739 - 2⁸ = 9640483 is a prime.

It is a super-2 number, since 2×9640739² = 185887696932242, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (9640639) 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, 4820369 + 4820370.

It is an arithmetic number, because the mean of its divisors is an integer number (4820370).

Almost surely, 2^9640739 is an apocalyptic number.

9640739 is a deficient number, since it is larger than the sum of its proper divisors (1).

9640739 is an equidigital number, since it uses as much as digits as its factorization.

9640739 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40824, while the sum is 38.

The square root of 9640739 is about 3104.9539449080. The cubic root of 9640739 is about 212.8319260121.

The spelling of 9640739 in words is "nine million, six hundred forty thousand, seven hundred thirty-nine".