199994861 has 8 divisors (see below), whose sum is σ = 218295648. Its totient is φ = 181714000.

The previous prime is 199994833. The next prime is 199994863. The reversal of 199994861 is 168499991.

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 199994861 - 2⁶ = 199994797 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 199994797 and 199994806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199994863) 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, 22751 + ... + 30291.

It is an arithmetic number, because the mean of its divisors is an integer number (27286956).

Almost surely, 2^199994861 is an apocalyptic number.

199994861 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

199994861 is a deficient number, since it is larger than the sum of its proper divisors (18300787).

199994861 is a wasteful number, since it uses less digits than its factorization.

199994861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9963.

The product of its digits is 1259712, while the sum is 56.

The square root of 199994861 is about 14141.9539314764. The cubic root of 199994861 is about 584.7985387573.

The spelling of 199994861 in words is "one hundred ninety-nine million, nine hundred ninety-four thousand, eight hundred sixty-one".