197881369 has 8 divisors (see below), whose sum is σ = 226321920. Its totient is φ = 169483776.

The previous prime is 197881363. The next prime is 197881391. The reversal of 197881369 is 963188791.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 197881369 - 2³ = 197881361 is a prime.

It is a super-2 number, since 2×197881369² = 78314072394628322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (197881361) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 169 + ... + 19894.

It is an arithmetic number, because the mean of its divisors is an integer number (28290240).

Almost surely, 2^197881369 is an apocalyptic number.

It is an amenable number.

197881369 is a deficient number, since it is larger than the sum of its proper divisors (28440551).

197881369 is a wasteful number, since it uses less digits than its factorization.

197881369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21479.

The product of its digits is 653184, while the sum is 52.

The square root of 197881369 is about 14067.0312788449. The cubic root of 197881369 is about 582.7312413631.

The spelling of 197881369 in words is "one hundred ninety-seven million, eight hundred eighty-one thousand, three hundred sixty-nine".