197716261 has 4 divisors (see below), whose sum is σ = 208122400. Its totient is φ = 187310124.

The previous prime is 197716231. The next prime is 197716297. The reversal of 197716261 is 162617791.

197716261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 197716261 - 2¹¹ = 197714213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197716231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5203041 + ... + 5203078.

It is an arithmetic number, because the mean of its divisors is an integer number (52030600).

Almost surely, 2^197716261 is an apocalyptic number.

It is an amenable number.

197716261 is a deficient number, since it is larger than the sum of its proper divisors (10406139).

197716261 is a wasteful number, since it uses less digits than its factorization.

197716261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10406138.

The product of its digits is 31752, while the sum is 40.

The square root of 197716261 is about 14061.1614385157. The cubic root of 197716261 is about 582.5691234198.

The spelling of 197716261 in words is "one hundred ninety-seven million, seven hundred sixteen thousand, two hundred sixty-one".