197906 has 4 divisors (see below), whose sum is σ = 296862. Its totient is φ = 98952.

The previous prime is 197893. The next prime is 197909. The reversal of 197906 is 609791.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 167281 + 30625 = 409^2 + 175^2 .

It is a nialpdrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (197909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49475 + ... + 49478.

2¹⁹⁷⁹⁰⁶ is an apocalyptic number.

197906 is a deficient number, since it is larger than the sum of its proper divisors (98956).

197906 is an equidigital number, since it uses as much as digits as its factorization.

197906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98955.

The product of its (nonzero) digits is 3402, while the sum is 32.

The square root of 197906 is about 444.8662720414. The cubic root of 197906 is about 58.2755418572.

The spelling of 197906 in words is "one hundred ninety-seven thousand, nine hundred six".