7278448979 has 2 divisors, whose sum is σ = 7278448980. Its totient is φ = 7278448978.

The previous prime is 7278448967. The next prime is 7278449053. The reversal of 7278448979 is 9798448727.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 7278448979 - 2⁴ = 7278448963 is a prime.

It is a super-2 number, since 2×7278448979² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (7278748979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3639224489 + 3639224490.

It is an arithmetic number, because the mean of its divisors is an integer number (3639224490).

Almost surely, 2^7278448979 is an apocalyptic number.

7278448979 is a deficient number, since it is larger than the sum of its proper divisors (1).

7278448979 is an equidigital number, since it uses as much as digits as its factorization.

7278448979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 56899584, while the sum is 65.

The square root of 7278448979 is about 85313.8264233881. The cubic root of 7278448979 is about 1937.9665677010.

The spelling of 7278448979 in words is "seven billion, two hundred seventy-eight million, four hundred forty-eight thousand, nine hundred seventy-nine".