1278148579 has 2 divisors, whose sum is σ = 1278148580. Its totient is φ = 1278148578.

The previous prime is 1278148577. The next prime is 1278148607. The reversal of 1278148579 is 9758418721.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1278148579 - 2¹ = 1278148577 is a prime.

Together with 1278148577, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1278148577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 639074289 + 639074290.

It is an arithmetic number, because the mean of its divisors is an integer number (639074290).

Almost surely, 2^1278148579 is an apocalyptic number.

1278148579 is a deficient number, since it is larger than the sum of its proper divisors (1).

1278148579 is an equidigital number, since it uses as much as digits as its factorization.

1278148579 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1128960, while the sum is 52.

The square root of 1278148579 is about 35751.2038818275. The cubic root of 1278148579 is about 1085.2433013525.

The spelling of 1278148579 in words is "one billion, two hundred seventy-eight million, one hundred forty-eight thousand, five hundred seventy-nine".