172898897 has 2 divisors, whose sum is σ = 172898898. Its totient is φ = 172898896.

The previous prime is 172898881. The next prime is 172898923. The reversal of 172898897 is 798898271.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 155850256 + 17048641 = 12484^2 + 4129^2 .

It is a cyclic number.

It is not a de Polignac number, because 172898897 - 2⁴ = 172898881 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (172898807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86449448 + 86449449.

It is an arithmetic number, because the mean of its divisors is an integer number (86449449).

Almost surely, 2^172898897 is an apocalyptic number.

It is an amenable number.

172898897 is a deficient number, since it is larger than the sum of its proper divisors (1).

172898897 is an equidigital number, since it uses as much as digits as its factorization.

172898897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4064256, while the sum is 59.

The square root of 172898897 is about 13149.1025169021. The cubic root of 172898897 is about 557.0968988451.

The spelling of 172898897 in words is "one hundred seventy-two million, eight hundred ninety-eight thousand, eight hundred ninety-seven".