1798665243 has 8 divisors (see below), whose sum is σ = 2398426128. Its totient is φ = 1199007264.

The previous prime is 1798665241. The next prime is 1798665259. The reversal of 1798665243 is 3425668971.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1798665243 - 2¹ = 1798665241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1798665241) 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 7 ways as a sum of consecutive naturals, for example, 36705 + ... + 70317.

It is an arithmetic number, because the mean of its divisors is an integer number (299803266).

Almost surely, 2^1798665243 is an apocalyptic number.

1798665243 is a deficient number, since it is larger than the sum of its proper divisors (599760885).

1798665243 is a wasteful number, since it uses less digits than its factorization.

1798665243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51453.

The product of its digits is 2177280, while the sum is 51.

The square root of 1798665243 is about 42410.6736918903. The cubic root of 1798665243 is about 1216.1396484048.

The spelling of 1798665243 in words is "one billion, seven hundred ninety-eight million, six hundred sixty-five thousand, two hundred forty-three".