191383 has 8 divisors (see below), whose sum is σ = 204768. Its totient is φ = 178464.

The previous prime is 191353. The next prime is 191413. The reversal of 191383 is 383191.

It is an interprime number because it is at equal distance from previous prime (191353) and next prime (191413).

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 191383 - 2⁹ = 190871 is a prime.

It is a super-3 number, since 3×191383³ = 21029615333936661, which contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191353) 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, 1141 + ... + 1297.

It is an arithmetic number, because the mean of its divisors is an integer number (25596).

2¹⁹¹³⁸³ is an apocalyptic number.

191383 is a deficient number, since it is larger than the sum of its proper divisors (13385).

191383 is a wasteful number, since it uses less digits than its factorization.

191383 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233.

The product of its digits is 648, while the sum is 25.

The square root of 191383 is about 437.4734277645. The cubic root of 191383 is about 57.6281201109.

It can be divided in two parts, 191 and 383, that multiplied together give a triangular number (73153 = T₃₈₂).

The spelling of 191383 in words is "one hundred ninety-one thousand, three hundred eighty-three".