199964417 has 4 divisors (see below), whose sum is σ = 210488880. Its totient is φ = 189439956.

The previous prime is 199964411. The next prime is 199964419. The reversal of 199964417 is 714469991.

It is a happy number.

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: 714469991 = 1429 ⋅499979.

It is not a de Polignac number, because 199964417 - 2²⁰ = 198915841 is a prime.

It is a super-2 number, since 2×199964417² = 79971536132299778, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (199964411) 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, 5262203 + ... + 5262240.

It is an arithmetic number, because the mean of its divisors is an integer number (52622220).

Almost surely, 2^199964417 is an apocalyptic number.

It is an amenable number.

199964417 is a deficient number, since it is larger than the sum of its proper divisors (10524463).

199964417 is a wasteful number, since it uses less digits than its factorization.

199964417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10524462.

The product of its digits is 489888, while the sum is 50.

The square root of 199964417 is about 14140.8775187398. The cubic root of 199964417 is about 584.7688638112.

The spelling of 199964417 in words is "one hundred ninety-nine million, nine hundred sixty-four thousand, four hundred seventeen".