8404790909 has 2 divisors, whose sum is σ = 8404790910. Its totient is φ = 8404790908.

The previous prime is 8404790887. The next prime is 8404790951. The reversal of 8404790909 is 9090974048.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7988426884 + 416364025 = 89378^2 + 20405^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8404790909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8404790969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4202395454 + 4202395455.

It is an arithmetic number, because the mean of its divisors is an integer number (4202395455).

Almost surely, 2^8404790909 is an apocalyptic number.

It is an amenable number.

8404790909 is a deficient number, since it is larger than the sum of its proper divisors (1).

8404790909 is an equidigital number, since it uses as much as digits as its factorization.

8404790909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 653184, while the sum is 50.

The square root of 8404790909 is about 91677.6467248151. The cubic root of 8404790909 is about 2033.1791054540.

The spelling of 8404790909 in words is "eight billion, four hundred four million, seven hundred ninety thousand, nine hundred nine".