199291 has 8 divisors (see below), whose sum is σ = 222480. Its totient is φ = 177408.

The previous prime is 199289. The next prime is 199313. The reversal of 199291 is 192991.

199291 = T₃₆₃ + T₃₆₄ + T₃₆₅.

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 199291 - 2¹ = 199289 is a prime.

It is a Duffinian number.

It is a plaindrome in base 9.

It is not an unprimeable number, because it can be changed into a prime (199211) 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, 15 + ... + 631.

It is an arithmetic number, because the mean of its divisors is an integer number (27810).

2¹⁹⁹²⁹¹ is an apocalyptic number.

199291 is the 365-th centered triangular number.

199291 is a deficient number, since it is larger than the sum of its proper divisors (23189).

199291 is a wasteful number, since it uses less digits than its factorization.

199291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 653.

The product of its digits is 1458, while the sum is 31.

The square root of 199291 is about 446.4202056359. The cubic root of 199291 is about 58.4111686589.

The spelling of 199291 in words is "one hundred ninety-nine thousand, two hundred ninety-one".