193997 has 4 divisors (see below), whose sum is σ = 194880. Its totient is φ = 193116.

The previous prime is 193993. The next prime is 194003. The reversal of 193997 is 799391.

It is a happy number.

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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 193997 - 2² = 193993 is a prime.

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 193997.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (193993) 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, 188 + ... + 650.

It is an arithmetic number, because the mean of its divisors is an integer number (48720).

2¹⁹³⁹⁹⁷ is an apocalyptic number.

It is an amenable number.

193997 is a deficient number, since it is larger than the sum of its proper divisors (883).

193997 is an equidigital number, since it uses as much as digits as its factorization.

193997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 882.

The product of its digits is 15309, while the sum is 38.

The square root of 193997 is about 440.4509053232. The cubic root of 193997 is about 57.8893053191.

The spelling of 193997 in words is "one hundred ninety-three thousand, nine hundred ninety-seven".