1320658705 has 4 divisors (see below), whose sum is σ = 1584790452. Its totient is φ = 1056526960.

The previous prime is 1320658681. The next prime is 1320658727. The reversal of 1320658705 is 5078560231.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5078560231 = 47 ⋅108054473.

It can be written as a sum of positive squares in 2 ways, for example, as 1006412176 + 314246529 = 31724^2 + 17727^2 .

It is not a de Polignac number, because 1320658705 - 2⁹ = 1320658193 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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, 132065866 + ... + 132065875.

It is an arithmetic number, because the mean of its divisors is an integer number (396197613).

Almost surely, 2^1320658705 is an apocalyptic number.

It is an amenable number.

1320658705 is a deficient number, since it is larger than the sum of its proper divisors (264131747).

1320658705 is an equidigital number, since it uses as much as digits as its factorization.

1320658705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264131746.

The product of its (nonzero) digits is 50400, while the sum is 37.

The square root of 1320658705 is about 36340.8682477455. The cubic root of 1320658705 is about 1097.1437482998.

The spelling of 1320658705 in words is "one billion, three hundred twenty million, six hundred fifty-eight thousand, seven hundred five".