8120577313 has 4 divisors (see below), whose sum is σ = 8120817940. Its totient is φ = 8120336688.

The previous prime is 8120577307. The next prime is 8120577337. The reversal of 8120577313 is 3137750218.

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 7175445264 + 945132049 = 84708^2 + 30743^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8120577313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8120577343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59418 + ... + 140611.

It is an arithmetic number, because the mean of its divisors is an integer number (2030204485).

Almost surely, 2^8120577313 is an apocalyptic number.

It is an amenable number.

8120577313 is a deficient number, since it is larger than the sum of its proper divisors (240627).

8120577313 is a wasteful number, since it uses less digits than its factorization.

8120577313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240626.

The product of its (nonzero) digits is 35280, while the sum is 37.

The square root of 8120577313 is about 90114.2458937542. The cubic root of 8120577313 is about 2009.9980456735.

The spelling of 8120577313 in words is "eight billion, one hundred twenty million, five hundred seventy-seven thousand, three hundred thirteen".