8347979 has 2 divisors, whose sum is σ = 8347980. Its totient is φ = 8347978.

The previous prime is 8347957. The next prime is 8347981. The reversal of 8347979 is 9797438.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8347979 is a prime.

Together with 8347981, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (8347909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4173989 + 4173990.

It is an arithmetic number, because the mean of its divisors is an integer number (4173990).

Almost surely, 2^8347979 is an apocalyptic number.

8347979 is a deficient number, since it is larger than the sum of its proper divisors (1).

8347979 is an equidigital number, since it uses as much as digits as its factorization.

8347979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 381024, while the sum is 47.

The square root of 8347979 is about 2889.2869362526. The cubic root of 8347979 is about 202.8587675454.

The spelling of 8347979 in words is "eight million, three hundred forty-seven thousand, nine hundred seventy-nine".