1328574389 has 2 divisors, whose sum is σ = 1328574390. Its totient is φ = 1328574388.

The previous prime is 1328574341. The next prime is 1328574407. The reversal of 1328574389 is 9834758231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1328019364 + 555025 = 36442^2 + 745^2 .

It is an emirp because it is prime and its reverse (9834758231) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1328574389 - 2²⁰ = 1327525813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1358574389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 664287194 + 664287195.

It is an arithmetic number, because the mean of its divisors is an integer number (664287195).

Almost surely, 2^1328574389 is an apocalyptic number.

It is an amenable number.

1328574389 is a deficient number, since it is larger than the sum of its proper divisors (1).

1328574389 is an equidigital number, since it uses as much as digits as its factorization.

1328574389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1451520, while the sum is 50.

The square root of 1328574389 is about 36449.6143875350. The cubic root of 1328574389 is about 1099.3313812757.

The spelling of 1328574389 in words is "one billion, three hundred twenty-eight million, five hundred seventy-four thousand, three hundred eighty-nine".