9997818419 has 2 divisors, whose sum is σ = 9997818420. Its totient is φ = 9997818418.

The previous prime is 9997818361. The next prime is 9997818451. The reversal of 9997818419 is 9148187999.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 9997818419 - 2³² = 5702851123 is a prime.

It is a super-2 number, since 2×9997818419² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (9997818499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4998909209 + 4998909210.

It is an arithmetic number, because the mean of its divisors is an integer number (4998909210).

Almost surely, 2^9997818419 is an apocalyptic number.

9997818419 is a deficient number, since it is larger than the sum of its proper divisors (1).

9997818419 is an equidigital number, since it uses as much as digits as its factorization.

9997818419 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11757312, while the sum is 65.

The square root of 9997818419 is about 99989.0915000231. The cubic root of 9997818419 is about 2154.2780095114.

The spelling of 9997818419 in words is "nine billion, nine hundred ninety-seven million, eight hundred eighteen thousand, four hundred nineteen".