191345 has 24 divisors (see below), whose sum is σ = 295488. Its totient is φ = 117600.

The previous prime is 191341. The next prime is 191353. The reversal of 191345 is 543191.

191345 = T₃₅ + T₃₆ + ... + T₁₀₅.

It is a happy number.

It is not a de Polignac number, because 191345 - 2² = 191341 is a prime.

It is a super-2 number, since 2×191345² = 73225818050, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 191345.

It is not an unprimeable number, because it can be changed into a prime (191341) 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 23 ways as a sum of consecutive naturals, for example, 2660 + ... + 2730.

It is an arithmetic number, because the mean of its divisors is an integer number (12312).

2¹⁹¹³⁴⁵ is an apocalyptic number.

It is an amenable number.

191345 is a deficient number, since it is larger than the sum of its proper divisors (104143).

191345 is a wasteful number, since it uses less digits than its factorization.

191345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101 (or 94 counting only the distinct ones).

The product of its digits is 540, while the sum is 23.

The square root of 191345 is about 437.4299943991. The cubic root of 191345 is about 57.6243057465.

The spelling of 191345 in words is "one hundred ninety-one thousand, three hundred forty-five".