1040401009 has 2 divisors, whose sum is σ = 1040401010. Its totient is φ = 1040401008.

The previous prime is 1040401001. The next prime is 1040401091. The reversal of 1040401009 is 9001040401.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 990486784 + 49914225 = 31472^2 + 7065^2 .

It is an emirp because it is prime and its reverse (9001040401) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1040401009 - 2³ = 1040401001 is a prime.

It is a super-3 number, since 3×1040401009³ (a number of 28 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (1040401001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 520200504 + 520200505.

It is an arithmetic number, because the mean of its divisors is an integer number (520200505).

Almost surely, 2^1040401009 is an apocalyptic number.

It is an amenable number.

1040401009 is a deficient number, since it is larger than the sum of its proper divisors (1).

1040401009 is an equidigital number, since it uses as much as digits as its factorization.

1040401009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 1040401009 is about 32255.2477745870. The cubic root of 1040401009 is about 1013.2896069712.

The spelling of 1040401009 in words is "one billion, forty million, four hundred one thousand, nine".