2120779547 has 2 divisors, whose sum is σ = 2120779548. Its totient is φ = 2120779546.

The previous prime is 2120779523. The next prime is 2120779621. The reversal of 2120779547 is 7459770212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2120779547 - 2²⁰ = 2119730971 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2120779498 and 2120779507.

It is not a weakly prime, because it can be changed into another prime (2120779247) 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 as a sum of consecutive naturals, namely, 1060389773 + 1060389774.

It is an arithmetic number, because the mean of its divisors is an integer number (1060389774).

Almost surely, 2^2120779547 is an apocalyptic number.

2120779547 is a deficient number, since it is larger than the sum of its proper divisors (1).

2120779547 is an equidigital number, since it uses as much as digits as its factorization.

2120779547 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 246960, while the sum is 44.

The square root of 2120779547 is about 46051.9222942973. The cubic root of 2120779547 is about 1284.7890960826.

The spelling of 2120779547 in words is "two billion, one hundred twenty million, seven hundred seventy-nine thousand, five hundred forty-seven".