201730897 has 2 divisors, whose sum is σ = 201730898. Its totient is φ = 201730896.

The previous prime is 201730889. The next prime is 201730927. The reversal of 201730897 is 798037102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 129072321 + 72658576 = 11361^2 + 8524^2 .

It is a cyclic number.

It is not a de Polignac number, because 201730897 - 2³ = 201730889 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (201730807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100865448 + 100865449.

It is an arithmetic number, because the mean of its divisors is an integer number (100865449).

Almost surely, 2^201730897 is an apocalyptic number.

It is an amenable number.

201730897 is a deficient number, since it is larger than the sum of its proper divisors (1).

201730897 is an equidigital number, since it uses as much as digits as its factorization.

201730897 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21168, while the sum is 37.

The square root of 201730897 is about 14203.2002379745. The cubic root of 201730897 is about 586.4857618800.

Adding to 201730897 its reverse (798037102), we get a palindrome (999767999).

The spelling of 201730897 in words is "two hundred one million, seven hundred thirty thousand, eight hundred ninety-seven".