1809085423 has 2 divisors, whose sum is σ = 1809085424. Its totient is φ = 1809085422.

The previous prime is 1809085367. The next prime is 1809085427. The reversal of 1809085423 is 3245809081.

It is a strong prime.

It is an emirp because it is prime and its reverse (3245809081) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1809085423 - 2¹⁷ = 1808954351 is a prime.

It is a super-2 number, since 2×1809085423² = 6545580135422177858, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1809085427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 904542711 + 904542712.

It is an arithmetic number, because the mean of its divisors is an integer number (904542712).

Almost surely, 2^1809085423 is an apocalyptic number.

1809085423 is a deficient number, since it is larger than the sum of its proper divisors (1).

1809085423 is an equidigital number, since it uses as much as digits as its factorization.

1809085423 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 69120, while the sum is 40.

The square root of 1809085423 is about 42533.3448367278. The cubic root of 1809085423 is about 1218.4836089155.

The spelling of 1809085423 in words is "one billion, eight hundred nine million, eighty-five thousand, four hundred twenty-three".