9959797 has 2 divisors, whose sum is σ = 9959798. Its totient is φ = 9959796.

The previous prime is 9959779. The next prime is 9959801. The reversal of 9959797 is 7979599.

Together with previous prime (9959779) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5058001 + 4901796 = 2249^2 + 2214^2 .

It is an emirp because it is prime and its reverse (7979599) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9959797 - 2¹⁹ = 9435509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9959777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4979898 + 4979899.

It is an arithmetic number, because the mean of its divisors is an integer number (4979899).

Almost surely, 2^9959797 is an apocalyptic number.

It is an amenable number.

9959797 is a deficient number, since it is larger than the sum of its proper divisors (1).

9959797 is an equidigital number, since it uses as much as digits as its factorization.

9959797 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1607445, while the sum is 55.

The square root of 9959797 is about 3155.9146059423. The cubic root of 9959797 is about 215.1543654359.

The spelling of 9959797 in words is "nine million, nine hundred fifty-nine thousand, seven hundred ninety-seven".