191279 has 4 divisors (see below), whose sum is σ = 208680. Its totient is φ = 173880.

The previous prime is 191251. The next prime is 191281. The reversal of 191279 is 972191.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 191279 - 2¹⁶ = 125743 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8684 + ... + 8705.

It is an arithmetic number, because the mean of its divisors is an integer number (52170).

2¹⁹¹²⁷⁹ is an apocalyptic number.

191279 is a deficient number, since it is larger than the sum of its proper divisors (17401).

191279 is a wasteful number, since it uses less digits than its factorization.

191279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17400.

The product of its digits is 1134, while the sum is 29.

The square root of 191279 is about 437.3545472497. The cubic root of 191279 is about 57.6176795973.

It can be divided in two parts, 1912 and 79, that added together give a palindrome (1991).

The spelling of 191279 in words is "one hundred ninety-one thousand, two hundred seventy-nine".