1378240579 has 4 divisors (see below), whose sum is σ = 1378386184. Its totient is φ = 1378094976.

The previous prime is 1378240559. The next prime is 1378240597. The reversal of 1378240579 is 9750428731.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1378240579 - 2²¹ = 1376143427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1378240559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57537 + ... + 77890.

It is an arithmetic number, because the mean of its divisors is an integer number (344596546).

Almost surely, 2^1378240579 is an apocalyptic number.

1378240579 is a deficient number, since it is larger than the sum of its proper divisors (145605).

1378240579 is a wasteful number, since it uses less digits than its factorization.

1378240579 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145604.

The product of its (nonzero) digits is 423360, while the sum is 46.

The square root of 1378240579 is about 37124.6626786022. The cubic root of 1378240579 is about 1112.8629336253.

The spelling of 1378240579 in words is "one billion, three hundred seventy-eight million, two hundred forty thousand, five hundred seventy-nine".