197772681 has 8 divisors (see below), whose sum is σ = 263799360. Its totient is φ = 131797232.

The previous prime is 197772667. The next prime is 197772709. The reversal of 197772681 is 186277791.

197772681 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 197772681 - 2¹⁰ = 197771657 is a prime.

It is a super-2 number, since 2×197772681² = 78228066699855522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 197772681.

It is not an unprimeable number, because it can be changed into a prime (197772181) 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, 2646 + ... + 20063.

It is an arithmetic number, because the mean of its divisors is an integer number (32974920).

Almost surely, 2^197772681 is an apocalyptic number.

It is an amenable number.

197772681 is a deficient number, since it is larger than the sum of its proper divisors (66026679).

197772681 is a wasteful number, since it uses less digits than its factorization.

197772681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25615.

The product of its digits is 296352, while the sum is 48.

The square root of 197772681 is about 14063.1675308232. The cubic root of 197772681 is about 582.6245318180.

The spelling of 197772681 in words is "one hundred ninety-seven million, seven hundred seventy-two thousand, six hundred eighty-one".