849399208513 has 2 divisors, whose sum is σ = 849399208514. Its totient is φ = 849399208512.

The previous prime is 849399208439. The next prime is 849399208561. The reversal of 849399208513 is 315802993948.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 738717903169 + 110681305344 = 859487^2 + 332688^2 .

It is a cyclic number.

It is not a de Polignac number, because 849399208513 - 2³³ = 840809273921 is a prime.

It is not a weakly prime, because it can be changed into another prime (849399268513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 424699604256 + 424699604257.

It is an arithmetic number, because the mean of its divisors is an integer number (424699604257).

Almost surely, 2^849399208513 is an apocalyptic number.

It is an amenable number.

849399208513 is a deficient number, since it is larger than the sum of its proper divisors (1).

849399208513 is an equidigital number, since it uses as much as digits as its factorization.

849399208513 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16796160, while the sum is 61.

The spelling of 849399208513 in words is "eight hundred forty-nine billion, three hundred ninety-nine million, two hundred eight thousand, five hundred thirteen".