9997443979 has 2 divisors, whose sum is σ = 9997443980. Its totient is φ = 9997443978.

The previous prime is 9997443949. The next prime is 9997444043. The reversal of 9997443979 is 9793447999.

It is a weak prime.

It is an emirp because it is prime and its reverse (9793447999) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9997443979 - 2¹¹ = 9997441931 is a prime.

It is a super-2 number, since 2×9997443979² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (9997443949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4998721989 + 4998721990.

It is an arithmetic number, because the mean of its divisors is an integer number (4998721990).

Almost surely, 2^9997443979 is an apocalyptic number.

9997443979 is a deficient number, since it is larger than the sum of its proper divisors (1).

9997443979 is an equidigital number, since it uses as much as digits as its factorization.

9997443979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 138883248, while the sum is 70.

The square root of 9997443979 is about 99987.2190782402. The cubic root of 9997443979 is about 2154.2511150466.

The spelling of 9997443979 in words is "nine billion, nine hundred ninety-seven million, four hundred forty-three thousand, nine hundred seventy-nine".