1040790809 has 2 divisors, whose sum is σ = 1040790810. Its totient is φ = 1040790808.

The previous prime is 1040790767. The next prime is 1040790851. The reversal of 1040790809 is 9080970401.

It is a balanced prime because it is at equal distance from previous prime (1040790767) and next prime (1040790851).

It can be written as a sum of positive squares in only one way, i.e., 829728025 + 211062784 = 28805^2 + 14528^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1040790809 is a prime.

It is not a weakly prime, because it can be changed into another prime (1040730809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 520395404 + 520395405.

It is an arithmetic number, because the mean of its divisors is an integer number (520395405).

Almost surely, 2^1040790809 is an apocalyptic number.

It is an amenable number.

1040790809 is a deficient number, since it is larger than the sum of its proper divisors (1).

1040790809 is an equidigital number, since it uses as much as digits as its factorization.

1040790809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 1040790809 is about 32261.2896363428. The cubic root of 1040790809 is about 1013.4161386218.

The spelling of 1040790809 in words is "one billion, forty million, seven hundred ninety thousand, eight hundred nine".