197993 has 4 divisors (see below), whose sum is σ = 199680. Its totient is φ = 196308.

The previous prime is 197971. The next prime is 198013. The reversal of 197993 is 399791.

It is a happy number.

197993 is nontrivially palindromic in base 14.

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.

It is a cyclic number.

It is not a de Polignac number, because 197993 - 2¹⁴ = 181609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (197933) 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, 653 + ... + 906.

It is an arithmetic number, because the mean of its divisors is an integer number (49920).

2¹⁹⁷⁹⁹³ is an apocalyptic number.

It is an amenable number.

197993 is a deficient number, since it is larger than the sum of its proper divisors (1687).

197993 is a wasteful number, since it uses less digits than its factorization.

197993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1686.

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

The square root of 197993 is about 444.9640434912. The cubic root of 197993 is about 58.2840799669.

The spelling of 197993 in words is "one hundred ninety-seven thousand, nine hundred ninety-three".