199713 has 4 divisors (see below), whose sum is σ = 266288. Its totient is φ = 133140.

The previous prime is 199697. The next prime is 199721. The reversal of 199713 is 317991.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 317991 = 3 ⋅105997.

It is not a de Polignac number, because 199713 - 2⁴ = 199697 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (199753) 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, 33283 + ... + 33288.

It is an arithmetic number, because the mean of its divisors is an integer number (66572).

2¹⁹⁹⁷¹³ is an apocalyptic number.

It is an amenable number.

199713 is a deficient number, since it is larger than the sum of its proper divisors (66575).

199713 is an equidigital number, since it uses as much as digits as its factorization.

199713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66574.

The product of its digits is 1701, while the sum is 30.

The square root of 199713 is about 446.8926045483. The cubic root of 199713 is about 58.4523682701.

The spelling of 199713 in words is "one hundred ninety-nine thousand, seven hundred thirteen".