197919 has 6 divisors (see below), whose sum is σ = 285896. Its totient is φ = 131940.

The previous prime is 197909. The next prime is 197921. The reversal of 197919 is 919791.

197919 = 32² + 33² + ... + 85².

197919 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 197919 - 2⁵ = 197887 is a prime.

It is a super-2 number, since 2×197919² = 78343861122, which contains 22 as substring.

It is a Duffinian number.

197919 is a lucky number.

It is a plaindrome in base 11.

It is a nialpdrome in base 12.

It is a congruent number.

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 in 5 ways as a sum of consecutive naturals, for example, 10987 + ... + 11004.

2¹⁹⁷⁹¹⁹ is an apocalyptic number.

197919 is a deficient number, since it is larger than the sum of its proper divisors (87977).

197919 is a wasteful number, since it uses less digits than its factorization.

197919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21997 (or 21994 counting only the distinct ones).

The product of its digits is 5103, while the sum is 36.

The square root of 197919 is about 444.8808829338. The cubic root of 197919 is about 58.2768178257.

The spelling of 197919 in words is "one hundred ninety-seven thousand, nine hundred nineteen".