1328792497 has 4 divisors (see below), whose sum is σ = 1332106596. Its totient is φ = 1325478400.

The previous prime is 1328792489. The next prime is 1328792503. The reversal of 1328792497 is 7942978231.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7942978231 = 593 ⋅13394567.

It can be written as a sum of positive squares in 2 ways, for example, as 936910881 + 391881616 = 30609^2 + 19796^2 .

It is a cyclic number.

It is not a de Polignac number, because 1328792497 - 2³ = 1328792489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1328792197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1656448 + ... + 1657249.

It is an arithmetic number, because the mean of its divisors is an integer number (333026649).

Almost surely, 2^1328792497 is an apocalyptic number.

It is an amenable number.

1328792497 is a deficient number, since it is larger than the sum of its proper divisors (3314099).

1328792497 is an equidigital number, since it uses as much as digits as its factorization.

1328792497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3314098.

The product of its digits is 1524096, while the sum is 52.

The square root of 1328792497 is about 36452.6061756906. The cubic root of 1328792497 is about 1099.3915359425.

The spelling of 1328792497 in words is "one billion, three hundred twenty-eight million, seven hundred ninety-two thousand, four hundred ninety-seven".