1719988993 has 8 divisors (see below), whose sum is σ = 1768099112. Its totient is φ = 1671964416.

The previous prime is 1719988981. The next prime is 1719988999. The reversal of 1719988993 is 3998899171.

It can be written as a sum of positive squares in 4 ways, for example, as 750102544 + 969886449 = 27388^2 + 31143^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1719988993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1719988999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20521 + ... + 62137.

It is an arithmetic number, because the mean of its divisors is an integer number (221012389).

Almost surely, 2^1719988993 is an apocalyptic number.

It is an amenable number.

1719988993 is a deficient number, since it is larger than the sum of its proper divisors (48110119).

1719988993 is a wasteful number, since it uses less digits than its factorization.

1719988993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42771.

The product of its digits is 8817984, while the sum is 64.

The square root of 1719988993 is about 41472.7500052745. The cubic root of 1719988993 is about 1198.1427271625.

The spelling of 1719988993 in words is "one billion, seven hundred nineteen million, nine hundred eighty-eight thousand, nine hundred ninety-three".