9738897979 has 2 divisors, whose sum is σ = 9738897980. Its totient is φ = 9738897978.

The previous prime is 9738897941. The next prime is 9738897989. The reversal of 9738897979 is 9797988379.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 9738897979 - 2¹⁵ = 9738865211 is a prime.

It is a super-2 number, since 2×9738897979² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (9738897989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4869448989 + 4869448990.

It is an arithmetic number, because the mean of its divisors is an integer number (4869448990).

Almost surely, 2^9738897979 is an apocalyptic number.

9738897979 is a deficient number, since it is larger than the sum of its proper divisors (1).

9738897979 is an equidigital number, since it uses as much as digits as its factorization.

9738897979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 432081216, while the sum is 76.

The square root of 9738897979 is about 98685.8550097226. The cubic root of 9738897979 is about 2135.5181756846.

The spelling of 9738897979 in words is "nine billion, seven hundred thirty-eight million, eight hundred ninety-seven thousand, nine hundred seventy-nine".