9979770247 has 2 divisors, whose sum is σ = 9979770248. Its totient is φ = 9979770246.

The previous prime is 9979770223. The next prime is 9979770257. The reversal of 9979770247 is 7420779799.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 9979770247 - 2¹¹ = 9979768199 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9979770257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4989885123 + 4989885124.

It is an arithmetic number, because the mean of its divisors is an integer number (4989885124).

Almost surely, 2^9979770247 is an apocalyptic number.

9979770247 is a deficient number, since it is larger than the sum of its proper divisors (1).

9979770247 is an equidigital number, since it uses as much as digits as its factorization.

9979770247 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14002632, while the sum is 61.

The square root of 9979770247 is about 99898.8000278282. The cubic root of 9979770247 is about 2152.9809198892.

The spelling of 9979770247 in words is "nine billion, nine hundred seventy-nine million, seven hundred seventy thousand, two hundred forty-seven".