1320895087709 has 4 divisors (see below), whose sum is σ = 1320912259740. Its totient is φ = 1320877915680.

The previous prime is 1320895087651. The next prime is 1320895087723. The reversal of 1320895087709 is 9077805980231.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 973764372025 + 347130715684 = 986795^2 + 589178^2 .

It is a cyclic number.

It is not a de Polignac number, because 1320895087709 - 2³² = 1316600120413 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 (1320895087739) 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, 8470112 + ... + 8624649.

It is an arithmetic number, because the mean of its divisors is an integer number (330228064935).

Almost surely, 2^{1320895087709} is an apocalyptic number.

It is an amenable number.

1320895087709 is a deficient number, since it is larger than the sum of its proper divisors (17172031).

1320895087709 is an equidigital number, since it uses as much as digits as its factorization.

1320895087709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17172030.

The product of its (nonzero) digits is 7620480, while the sum is 59.

The spelling of 1320895087709 in words is "one trillion, three hundred twenty billion, eight hundred ninety-five million, eighty-seven thousand, seven hundred nine".