9219797449 has 2 divisors, whose sum is σ = 9219797450. Its totient is φ = 9219797448.

The previous prime is 9219797407. The next prime is 9219797453. The reversal of 9219797449 is 9447979129.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6850541824 + 2369255625 = 82768^2 + 48675^2 .

It is an emirp because it is prime and its reverse (9447979129) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9219797449 - 2¹¹ = 9219795401 is a prime.

It is not a weakly prime, because it can be changed into another prime (9219797749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4609898724 + 4609898725.

It is an arithmetic number, because the mean of its divisors is an integer number (4609898725).

Almost surely, 2^9219797449 is an apocalyptic number.

It is an amenable number.

9219797449 is a deficient number, since it is larger than the sum of its proper divisors (1).

9219797449 is an equidigital number, since it uses as much as digits as its factorization.

9219797449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10287648, while the sum is 61.

The square root of 9219797449 is about 96019.7763432096. The cubic root of 9219797449 is about 2096.8810426002.

The spelling of 9219797449 in words is "nine billion, two hundred nineteen million, seven hundred ninety-seven thousand, four hundred forty-nine".