1328797439 has 4 divisors (see below), whose sum is σ = 1328874120. Its totient is φ = 1328720760.

The previous prime is 1328797417. The next prime is 1328797451. The reversal of 1328797439 is 9347978231.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 9347978231 = 59 ⋅158440309.

It is a cyclic number.

It is not a de Polignac number, because 1328797439 - 2¹² = 1328793343 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1328797039) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1349 + ... + 51569.

It is an arithmetic number, because the mean of its divisors is an integer number (332218530).

Almost surely, 2^1328797439 is an apocalyptic number.

1328797439 is a deficient number, since it is larger than the sum of its proper divisors (76681).

1328797439 is an equidigital number, since it uses as much as digits as its factorization.

1328797439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76680.

The product of its digits is 2286144, while the sum is 53.

The square root of 1328797439 is about 36452.6739622761. The cubic root of 1328797439 is about 1099.3928988807.

The spelling of 1328797439 in words is "one billion, three hundred twenty-eight million, seven hundred ninety-seven thousand, four hundred thirty-nine".