405000049 has 2 divisors, whose sum is σ = 405000050. Its totient is φ = 405000048.

The previous prime is 405000041. The next prime is 405000053. The reversal of 405000049 is 940000504.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 310288225 + 94711824 = 17615^2 + 9732^2 .

It is a cyclic number.

It is not a de Polignac number, because 405000049 - 2³ = 405000041 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 404999993 and 405000029.

It is not a weakly prime, because it can be changed into another prime (405000041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202500024 + 202500025.

It is an arithmetic number, because the mean of its divisors is an integer number (202500025).

Almost surely, 2^405000049 is an apocalyptic number.

It is an amenable number.

405000049 is a deficient number, since it is larger than the sum of its proper divisors (1).

405000049 is an equidigital number, since it uses as much as digits as its factorization.

405000049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 405000049 is about 20124.6130149129. The cubic root of 405000049 is about 739.8636521373.

The spelling of 405000049 in words is "four hundred five million, forty-nine", and thus it is an aban number.