9965797 has 2 divisors, whose sum is σ = 9965798. Its totient is φ = 9965796.

The previous prime is 9965783. The next prime is 9965801. The reversal of 9965797 is 7975699.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5239521 + 4726276 = 2289^2 + 2174^2 .

It is a cyclic number.

It is not a de Polignac number, because 9965797 - 2¹¹ = 9963749 is a prime.

9965797 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9965717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4982898 + 4982899.

It is an arithmetic number, because the mean of its divisors is an integer number (4982899).

Almost surely, 2^9965797 is an apocalyptic number.

It is an amenable number.

9965797 is a deficient number, since it is larger than the sum of its proper divisors (1).

9965797 is an equidigital number, since it uses as much as digits as its factorization.

9965797 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1071630, while the sum is 52.

The square root of 9965797 is about 3156.8650588836. The cubic root of 9965797 is about 215.1975613314.

It can be divided in two parts, 9965 and 797, that multiplied together give a triangular number (7942105 = T₃₉₈₅).

The spelling of 9965797 in words is "nine million, nine hundred sixty-five thousand, seven hundred ninety-seven".