194389 has 8 divisors (see below), whose sum is σ = 220640. Its totient is φ = 169776.

The previous prime is 194377. The next prime is 194413. The reversal of 194389 is 983491.

194389 = 92² + 93² + ... + 110².

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 194389 - 2⁹ = 193877 is a prime.

It is a Duffinian number.

194389 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194309) 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, 147 + ... + 640.

It is an arithmetic number, because the mean of its divisors is an integer number (27580).

2¹⁹⁴³⁸⁹ is an apocalyptic number.

194389 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

194389 is a deficient number, since it is larger than the sum of its proper divisors (26251).

194389 is a wasteful number, since it uses less digits than its factorization.

194389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 819.

The product of its digits is 7776, while the sum is 34.

The square root of 194389 is about 440.8956792712. The cubic root of 194389 is about 57.9282704237.

It can be divided in two parts, 194 and 389, that multiplied together give a triangular number (75466 = T₃₈₈).

The spelling of 194389 in words is "one hundred ninety-four thousand, three hundred eighty-nine".