849347473409 has 2 divisors, whose sum is σ = 849347473410. Its totient is φ = 849347473408.

The previous prime is 849347473399. The next prime is 849347473459. The reversal of 849347473409 is 904374743948.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 448116442225 + 401231031184 = 669415^2 + 633428^2 .

It is a cyclic number.

It is not a de Polignac number, because 849347473409 - 2¹⁶ = 849347407873 is a prime.

It is a super-2 number, since 2×849347473409² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (849347473459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 424673736704 + 424673736705.

It is an arithmetic number, because the mean of its divisors is an integer number (424673736705).

Almost surely, 2^849347473409 is an apocalyptic number.

It is an amenable number.

849347473409 is a deficient number, since it is larger than the sum of its proper divisors (1).

849347473409 is an equidigital number, since it uses as much as digits as its factorization.

849347473409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 73156608, while the sum is 62.

The spelling of 849347473409 in words is "eight hundred forty-nine billion, three hundred forty-seven million, four hundred seventy-three thousand, four hundred nine".