199929913 has 4 divisors (see below), whose sum is σ = 210452560. Its totient is φ = 189407268.

The previous prime is 199929893. The next prime is 199929941. The reversal of 199929913 is 319929991.

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: 319929991 = 89 ⋅3594719.

It is a cyclic number.

It is not a de Polignac number, because 199929913 - 2¹³ = 199921721 is a prime.

It is a super-2 number, since 2×199929913² = 79943940224375138, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (199929713) 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, 5261295 + ... + 5261332.

It is an arithmetic number, because the mean of its divisors is an integer number (52613140).

Almost surely, 2^199929913 is an apocalyptic number.

It is an amenable number.

199929913 is a deficient number, since it is larger than the sum of its proper divisors (10522647).

199929913 is a wasteful number, since it uses less digits than its factorization.

199929913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10522646.

The product of its digits is 354294, while the sum is 52.

The square root of 199929913 is about 14139.6574569542. The cubic root of 199929913 is about 584.7352277843.

The spelling of 199929913 in words is "one hundred ninety-nine million, nine hundred twenty-nine thousand, nine hundred thirteen".