199279381 has 8 divisors (see below), whose sum is σ = 229257344. Its totient is φ = 169678800.

The previous prime is 199279369. The next prime is 199279411. The reversal of 199279381 is 183972991.

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 199279381 - 2¹⁹ = 198755093 is a prime.

It is a super-2 number, since 2×199279381² = 79424543383486322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199279331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93210 + ... + 95323.

It is an arithmetic number, because the mean of its divisors is an integer number (28657168).

Almost surely, 2^199279381 is an apocalyptic number.

It is an amenable number.

199279381 is a deficient number, since it is larger than the sum of its proper divisors (29977963).

199279381 is a wasteful number, since it uses less digits than its factorization.

199279381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188691.

The product of its digits is 244944, while the sum is 49.

The square root of 199279381 is about 14116.6349035455. The cubic root of 199279381 is about 584.1003348047.

The spelling of 199279381 in words is "one hundred ninety-nine million, two hundred seventy-nine thousand, three hundred eighty-one".