404080909 has 2 divisors, whose sum is σ = 404080910. Its totient is φ = 404080908.

The previous prime is 404080903. The next prime is 404080913. The reversal of 404080909 is 909080404.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 244766025 + 159314884 = 15645^2 + 12622^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-404080909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (404080903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202040454 + 202040455.

It is an arithmetic number, because the mean of its divisors is an integer number (202040455).

Almost surely, 2^404080909 is an apocalyptic number.

It is an amenable number.

404080909 is a deficient number, since it is larger than the sum of its proper divisors (1).

404080909 is an equidigital number, since it uses as much as digits as its factorization.

404080909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 404080909 is about 20101.7638280824. The cubic root of 404080909 is about 739.3035259733.

The spelling of 404080909 in words is "four hundred four million, eighty thousand, nine hundred nine".