4209772009 has 2 divisors, whose sum is σ = 4209772010. Its totient is φ = 4209772008.

The previous prime is 4209771971. The next prime is 4209772013. The reversal of 4209772009 is 9002779024.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4201632400 + 8139609 = 64820^2 + 2853^2 .

It is a cyclic number.

It is not a de Polignac number, because 4209772009 - 2¹⁷ = 4209640937 is a prime.

It is not a weakly prime, because it can be changed into another prime (4209772079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2104886004 + 2104886005.

It is an arithmetic number, because the mean of its divisors is an integer number (2104886005).

Almost surely, 2^4209772009 is an apocalyptic number.

It is an amenable number.

4209772009 is a deficient number, since it is larger than the sum of its proper divisors (1).

4209772009 is an equidigital number, since it uses as much as digits as its factorization.

4209772009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 63504, while the sum is 40.

The square root of 4209772009 is about 64882.7558677959. The cubic root of 4209772009 is about 1614.6789815222.

The spelling of 4209772009 in words is "four billion, two hundred nine million, seven hundred seventy-two thousand, nine".