9979747417 has 2 divisors, whose sum is σ = 9979747418. Its totient is φ = 9979747416.

The previous prime is 9979747387. The next prime is 9979747423. The reversal of 9979747417 is 7147479799.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6151108041 + 3828639376 = 78429^2 + 61876^2 .

It is an emirp because it is prime and its reverse (7147479799) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9979747417 - 2⁷ = 9979747289 is a prime.

It is not a weakly prime, because it can be changed into another prime (9979747457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4989873708 + 4989873709.

It is an arithmetic number, because the mean of its divisors is an integer number (4989873709).

Almost surely, 2^9979747417 is an apocalyptic number.

It is an amenable number.

9979747417 is a deficient number, since it is larger than the sum of its proper divisors (1).

9979747417 is an equidigital number, since it uses as much as digits as its factorization.

9979747417 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28005264, while the sum is 64.

The square root of 9979747417 is about 99898.6857621260. The cubic root of 9979747417 is about 2152.9792781483.

The spelling of 9979747417 in words is "nine billion, nine hundred seventy-nine million, seven hundred forty-seven thousand, four hundred seventeen".