172197611089 has 9 divisors (see below), whose sum is σ = 200314885851. Its totient is φ = 147595462560.

The previous prime is 172197611081. The next prime is 172197611137. The reversal of 172197611089 is 980116791271.

It is a happy number.

The square root of 172197611089 is 414967.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 153219793489 + 18977817600 = 391433^2 + 137760^2 .

It is not a de Polignac number, because 172197611089 - 2³ = 172197611081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172197611081) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2875129 + ... + 2934409.

It is an arithmetic number, because the mean of its divisors is an integer number (22257209539).

Almost surely, 2^172197611089 is an apocalyptic number.

172197611089 is the 414967-th square number.

172197611089 is the 207484-th centered octagonal number.

It is an amenable number.

172197611089 is a deficient number, since it is larger than the sum of its proper divisors (28117274762).

172197611089 is an frugal number, since it uses more digits than its factorization.

172197611089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118576 (or 59288 counting only the distinct ones).

The product of its (nonzero) digits is 381024, while the sum is 52.

The spelling of 172197611089 in words is "one hundred seventy-two billion, one hundred ninety-seven million, six hundred eleven thousand, eighty-nine".