4020770209 has 2 divisors, whose sum is σ = 4020770210. Its totient is φ = 4020770208.

The previous prime is 4020770189. The next prime is 4020770227. The reversal of 4020770209 is 9020770204.

It is a happy number.

4020770209 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3416987025 + 603783184 = 58455^2 + 24572^2 .

It is a cyclic number.

It is not a de Polignac number, because 4020770209 - 2¹³ = 4020762017 is a prime.

It is not a weakly prime, because it can be changed into another prime (4020770239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2010385104 + 2010385105.

It is an arithmetic number, because the mean of its divisors is an integer number (2010385105).

Almost surely, 2^4020770209 is an apocalyptic number.

It is an amenable number.

4020770209 is a deficient number, since it is larger than the sum of its proper divisors (1).

4020770209 is an equidigital number, since it uses as much as digits as its factorization.

4020770209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 4020770209 is about 63409.5435167294. The cubic root of 4020770209 is about 1590.1438643346.

The spelling of 4020770209 in words is "four billion, twenty million, seven hundred seventy thousand, two hundred nine".