191153 has 4 divisors (see below), whose sum is σ = 199488. Its totient is φ = 182820.

The previous prime is 191143. The next prime is 191161. The reversal of 191153 is 351191.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 351191 = 331 ⋅1061.

It is a cyclic number.

It is not a de Polignac number, because 191153 - 2⁴ = 191137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (191123) 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, 4133 + ... + 4178.

It is an arithmetic number, because the mean of its divisors is an integer number (49872).

2¹⁹¹¹⁵³ is an apocalyptic number.

It is an amenable number.

191153 is a deficient number, since it is larger than the sum of its proper divisors (8335).

191153 is an equidigital number, since it uses as much as digits as its factorization.

191153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8334.

The product of its digits is 135, while the sum is 20.

The square root of 191153 is about 437.2104756293. The cubic root of 191153 is about 57.6050254424.

The spelling of 191153 in words is "one hundred ninety-one thousand, one hundred fifty-three".