1809373249 has 16 divisors (see below), whose sum is σ = 2033856000. Its totient is φ = 1601631360.

The previous prime is 1809373231. The next prime is 1809373253. The reversal of 1809373249 is 9423739081.

It is a cyclic number.

It is not a de Polignac number, because 1809373249 - 2²⁵ = 1775818817 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1809373199 and 1809373208.

It is not an unprimeable number, because it can be changed into a prime (1809373229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35884 + ... + 70045.

It is an arithmetic number, because the mean of its divisors is an integer number (127116000).

Almost surely, 2^1809373249 is an apocalyptic number.

1809373249 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1809373249 is a deficient number, since it is larger than the sum of its proper divisors (224482751).

1809373249 is a wasteful number, since it uses less digits than its factorization.

1809373249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106008.

The product of its (nonzero) digits is 326592, while the sum is 46.

The square root of 1809373249 is about 42536.7282357259. The cubic root of 1809373249 is about 1218.5482258505.

The spelling of 1809373249 in words is "one billion, eight hundred nine million, three hundred seventy-three thousand, two hundred forty-nine".