655847897 has 2 divisors, whose sum is σ = 655847898. Its totient is φ = 655847896.

The previous prime is 655847891. The next prime is 655847923. The reversal of 655847897 is 798748556.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 421727296 + 234120601 = 20536^2 + 15301^2 .

It is a cyclic number.

It is not a de Polignac number, because 655847897 - 2¹² = 655843801 is a prime.

It is not a weakly prime, because it can be changed into another prime (655847891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327923948 + 327923949.

It is an arithmetic number, because the mean of its divisors is an integer number (327923949).

Almost surely, 2^655847897 is an apocalyptic number.

It is an amenable number.

655847897 is a deficient number, since it is larger than the sum of its proper divisors (1).

655847897 is an equidigital number, since it uses as much as digits as its factorization.

655847897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16934400, while the sum is 59.

The square root of 655847897 is about 25609.5274653790. The cubic root of 655847897 is about 868.8291366104.

The spelling of 655847897 in words is "six hundred fifty-five million, eight hundred forty-seven thousand, eight hundred ninety-seven".