1809299713 has 4 divisors (see below), whose sum is σ = 1948476628. Its totient is φ = 1670122800.

The previous prime is 1809299707. The next prime is 1809299729. The reversal of 1809299713 is 3179929081.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 879537649 + 929762064 = 29657^2 + 30492^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1809299713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1809299773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69588438 + ... + 69588463.

It is an arithmetic number, because the mean of its divisors is an integer number (487119157).

Almost surely, 2^1809299713 is an apocalyptic number.

1809299713 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1809299713 is a deficient number, since it is larger than the sum of its proper divisors (139176915).

1809299713 is a wasteful number, since it uses less digits than its factorization.

1809299713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139176914.

The product of its (nonzero) digits is 244944, while the sum is 49.

The square root of 1809299713 is about 42535.8638445254. The cubic root of 1809299713 is about 1218.5317176707.

The spelling of 1809299713 in words is "one billion, eight hundred nine million, two hundred ninety-nine thousand, seven hundred thirteen".