199719705 has 8 divisors (see below), whose sum is σ = 319551552. Its totient is φ = 106517168.

The previous prime is 199719679. The next prime is 199719721. The reversal of 199719705 is 507917991.

It is a happy number.

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 199719705 - 2¹⁵ = 199686937 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6657309 + ... + 6657338.

It is an arithmetic number, because the mean of its divisors is an integer number (39943944).

Almost surely, 2^199719705 is an apocalyptic number.

199719705 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

199719705 is a deficient number, since it is larger than the sum of its proper divisors (119831847).

199719705 is a wasteful number, since it uses less digits than its factorization.

199719705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13314655.

The product of its (nonzero) digits is 178605, while the sum is 48.

The square root of 199719705 is about 14132.2222244062. Note that the first 5 decimals coincide. The cubic root of 199719705 is about 584.5302240667.

The spelling of 199719705 in words is "one hundred ninety-nine million, seven hundred nineteen thousand, seven hundred five".