197609801 has 4 divisors (see below), whose sum is σ = 197802132. Its totient is φ = 197417472.

The previous prime is 197609773. The next prime is 197609807. The reversal of 197609801 is 108906791.

It is a happy number.

197609801 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 an emirpimes, since its reverse is a distinct semiprime: 108906791 = 7 ⋅15558113.

It can be written as a sum of positive squares in 2 ways, for example, as 142181776 + 55428025 = 11924^2 + 7445^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-197609801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (197609807) 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, 94616 + ... + 96681.

It is an arithmetic number, because the mean of its divisors is an integer number (49450533).

Almost surely, 2^197609801 is an apocalyptic number.

It is an amenable number.

197609801 is a deficient number, since it is larger than the sum of its proper divisors (192331).

197609801 is a wasteful number, since it uses less digits than its factorization.

197609801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192330.

The product of its (nonzero) digits is 27216, while the sum is 41.

The square root of 197609801 is about 14057.3753240070. The cubic root of 197609801 is about 582.4645435141.

The spelling of 197609801 in words is "one hundred ninety-seven million, six hundred nine thousand, eight hundred one".