2820990769 has 3 divisors (see below), whose sum is σ = 2821043883. Its totient is φ = 2820937656.

The previous prime is 2820990749. The next prime is 2820990817. The reversal of 2820990769 is 9670990282.

The square root of 2820990769 is 53113.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 9670990282 = 2 ⋅4835495141.

It can be written as a sum of positive squares in only one way, i.e., 1415640625 + 1405350144 = 37625^2 + 37488^2 .

It is not a de Polignac number, because 2820990769 - 2⁹ = 2820990257 is a prime.

It is a super-2 number, since 2×2820990769² = 15915977837566422722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2820990709) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 26557 + ... + 79669.

It is an arithmetic number, because the mean of its divisors is an integer number (940347961).

Almost surely, 2^2820990769 is an apocalyptic number.

2820990769 is the 53113-rd square number.

2820990769 is the 26557-th centered octagonal number.

It is an amenable number.

2820990769 is a deficient number, since it is larger than the sum of its proper divisors (53114).

2820990769 is an frugal number, since it uses more digits than its factorization.

2820990769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106226 (or 53113 counting only the distinct ones).

The product of its (nonzero) digits is 979776, while the sum is 52.

The cubic root of 2820990769 is about 1412.9730819769.

The spelling of 2820990769 in words is "two billion, eight hundred twenty million, nine hundred ninety thousand, seven hundred sixty-nine".