1719998399 has 8 divisors (see below), whose sum is σ = 1968107520. Its totient is φ = 1472488056.

The previous prime is 1719998393. The next prime is 1719998411. The reversal of 1719998399 is 9938999171.

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

It is a cyclic number.

It is not a de Polignac number, because 1719998399 - 2²⁸ = 1451562943 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1719998393) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 143519 + ... + 155040.

It is an arithmetic number, because the mean of its divisors is an integer number (246013440).

Almost surely, 2^1719998399 is an apocalyptic number.

1719998399 is a deficient number, since it is larger than the sum of its proper divisors (248109121).

1719998399 is an equidigital number, since it uses as much as digits as its factorization.

1719998399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299389.

The product of its digits is 9920232, while the sum is 65.

The square root of 1719998399 is about 41472.8634048820. The cubic root of 1719998399 is about 1198.1449112288.

The spelling of 1719998399 in words is "one billion, seven hundred nineteen million, nine hundred ninety-eight thousand, three hundred ninety-nine".