199791361 has 16 divisors (see below), whose sum is σ = 263744640. Its totient is φ = 146522880.

The previous prime is 199791359. The next prime is 199791419. The reversal of 199791361 is 163197991.

It is not a de Polignac number, because 199791361 - 2¹ = 199791359 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (199791301) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75006 + ... + 77623.

It is an arithmetic number, because the mean of its divisors is an integer number (16484040).

Almost surely, 2^199791361 is an apocalyptic number.

199791361 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

199791361 is a deficient number, since it is larger than the sum of its proper divisors (63953279).

199791361 is a wasteful number, since it uses less digits than its factorization.

199791361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152664.

The product of its digits is 91854, while the sum is 46.

The square root of 199791361 is about 14134.7571963582. The cubic root of 199791361 is about 584.6001221764.

The spelling of 199791361 in words is "one hundred ninety-nine million, seven hundred ninety-one thousand, three hundred sixty-one".