19397 has 8 divisors (see below), whose sum is σ = 23616. Its totient is φ = 15552.

The previous prime is 19391. The next prime is 19403. The reversal of 19397 is 79391.

It is an interprime number because it is at equal distance from previous prime (19391) and next prime (19403).

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 19397 - 2⁴ = 19381 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19391) 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, 38 + ... + 200.

It is an arithmetic number, because the mean of its divisors is an integer number (2952).

2¹⁹³⁹⁷ is an apocalyptic number.

19397 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

19397 is a deficient number, since it is larger than the sum of its proper divisors (4219).

19397 is a wasteful number, since it uses less digits than its factorization.

19397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187.

The product of its digits is 1701, while the sum is 29.

The square root of 19397 is about 139.2731129831. The cubic root of 19397 is about 26.8685886996.

It can be divided in two parts, 193 and 97, that multiplied together give a triangular number (18721 = T₁₉₃).

The spelling of 19397 in words is "nineteen thousand, three hundred ninety-seven".