197311 has 2 divisors, whose sum is σ = 197312. Its totient is φ = 197310.

The previous prime is 197299. The next prime is 197339. The reversal of 197311 is 113791.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 197311 - 2⁵ = 197279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (197341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98655 + 98656.

It is an arithmetic number, because the mean of its divisors is an integer number (98656).

2¹⁹⁷³¹¹ is an apocalyptic number.

197311 is a deficient number, since it is larger than the sum of its proper divisors (1).

197311 is an equidigital number, since it uses as much as digits as its factorization.

197311 is an evil number, because the sum of its binary digits is even.

The product of its digits is 189, while the sum is 22.

The square root of 197311 is about 444.1970283557. The cubic root of 197311 is about 58.2170818571.

The spelling of 197311 in words is "one hundred ninety-seven thousand, three hundred eleven".