849997 has 2 divisors, whose sum is σ = 849998. Its totient is φ = 849996.

The previous prime is 849991. The next prime is 850009. The reversal of 849997 is 799948.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 826281 + 23716 = 909^2 + 154^2 .

It is a cyclic number.

It is not a de Polignac number, because 849997 - 2⁷ = 849869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (849991) 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, 424998 + 424999.

It is an arithmetic number, because the mean of its divisors is an integer number (424999).

2⁸⁴⁹⁹⁹⁷ is an apocalyptic number.

It is an amenable number.

849997 is a deficient number, since it is larger than the sum of its proper divisors (1).

849997 is an equidigital number, since it uses as much as digits as its factorization.

849997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 163296, while the sum is 46.

The square root of 849997 is about 921.9528187494. The cubic root of 849997 is about 94.7267122751.

It can be divided in two parts, 8 and 49997, that added together give a palindrome (50005).

The spelling of 849997 in words is "eight hundred forty-nine thousand, nine hundred ninety-seven".