7021711979 has 2 divisors, whose sum is σ = 7021711980. Its totient is φ = 7021711978.

The previous prime is 7021711847. The next prime is 7021712041. The reversal of 7021711979 is 9791171207.

It is a strong prime.

It is an emirp because it is prime and its reverse (9791171207) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7021711979 is a prime.

It is not a weakly prime, because it can be changed into another prime (7021711379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3510855989 + 3510855990.

It is an arithmetic number, because the mean of its divisors is an integer number (3510855990).

Almost surely, 2^7021711979 is an apocalyptic number.

7021711979 is a deficient number, since it is larger than the sum of its proper divisors (1).

7021711979 is an equidigital number, since it uses as much as digits as its factorization.

7021711979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 55566, while the sum is 44.

The square root of 7021711979 is about 83795.6560866970. The cubic root of 7021711979 is about 1914.9069281937.

The spelling of 7021711979 in words is "seven billion, twenty-one million, seven hundred eleven thousand, nine hundred seventy-nine".