109291 has 8 divisors (see below), whose sum is σ = 134624. Its totient is φ = 86400.

The previous prime is 109279. The next prime is 109297. The reversal of 109291 is 192901.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a 7-Lehmer number, since φ(109291) divides (109291-1)⁷.

It is a cyclic number.

It is not a de Polignac number, because 109291 - 2¹¹ = 107243 is a prime.

It is not an unprimeable number, because it can be changed into a prime (109297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 510 + ... + 691.

It is an arithmetic number, because the mean of its divisors is an integer number (16828).

2¹⁰⁹²⁹¹ is an apocalyptic number.

109291 is a deficient number, since it is larger than the sum of its proper divisors (25333).

109291 is a wasteful number, since it uses less digits than its factorization.

109291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1221.

The product of its (nonzero) digits is 162, while the sum is 22.

The square root of 109291 is about 330.5918934275. The cubic root of 109291 is about 47.8110336743.

It can be divided in two parts, 109 and 291, that added together give a square (400 = 20²).

The spelling of 109291 in words is "one hundred nine thousand, two hundred ninety-one".