1090671409 has 2 divisors, whose sum is σ = 1090671410. Its totient is φ = 1090671408.

The previous prime is 1090671401. The next prime is 1090671443. The reversal of 1090671409 is 9041760901.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 785400625 + 305270784 = 28025^2 + 17472^2 .

It is an emirp because it is prime and its reverse (9041760901) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1090671409 - 2³ = 1090671401 is a prime.

It is not a weakly prime, because it can be changed into another prime (1090671401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 545335704 + 545335705.

It is an arithmetic number, because the mean of its divisors is an integer number (545335705).

Almost surely, 2^1090671409 is an apocalyptic number.

It is an amenable number.

1090671409 is a deficient number, since it is larger than the sum of its proper divisors (1).

1090671409 is an equidigital number, since it uses as much as digits as its factorization.

1090671409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13608, while the sum is 37.

The square root of 1090671409 is about 33025.3146692049. The cubic root of 1090671409 is about 1029.3537306966.

The spelling of 1090671409 in words is "one billion, ninety million, six hundred seventy-one thousand, four hundred nine".