199382489 has 4 divisors (see below), whose sum is σ = 199427556. Its totient is φ = 199337424.

The previous prime is 199382471. The next prime is 199382501. The reversal of 199382489 is 984283991.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 984283991 = 24683 ⋅39877.

It can be written as a sum of positive squares in 2 ways, for example, as 62094400 + 137288089 = 7880^2 + 11717^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-199382489 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 199382489.

It is not an unprimeable number, because it can be changed into a prime (199382189) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15074 + ... + 25019.

It is an arithmetic number, because the mean of its divisors is an integer number (49856889).

Almost surely, 2^199382489 is an apocalyptic number.

It is an amenable number.

199382489 is a deficient number, since it is larger than the sum of its proper divisors (45067).

199382489 is an equidigital number, since it uses as much as digits as its factorization.

199382489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45066.

The product of its digits is 1119744, while the sum is 53.

The square root of 199382489 is about 14120.2864347718. The cubic root of 199382489 is about 584.2010561020.

The spelling of 199382489 in words is "one hundred ninety-nine million, three hundred eighty-two thousand, four hundred eighty-nine".