1389471079 has 2 divisors, whose sum is σ = 1389471080. Its totient is φ = 1389471078.

The previous prime is 1389471071. The next prime is 1389471131. The reversal of 1389471079 is 9701749831.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1389471079 - 2³ = 1389471071 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1389471071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 694735539 + 694735540.

It is an arithmetic number, because the mean of its divisors is an integer number (694735540).

Almost surely, 2^1389471079 is an apocalyptic number.

1389471079 is a deficient number, since it is larger than the sum of its proper divisors (1).

1389471079 is an equidigital number, since it uses as much as digits as its factorization.

1389471079 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 381024, while the sum is 49.

The square root of 1389471079 is about 37275.6097066165. The cubic root of 1389471079 is about 1115.8774565903.

The spelling of 1389471079 in words is "one billion, three hundred eighty-nine million, four hundred seventy-one thousand, seventy-nine".