849673457 has 2 divisors, whose sum is σ = 849673458. Its totient is φ = 849673456.

The previous prime is 849673427. The next prime is 849673493. The reversal of 849673457 is 754376948.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 640899856 + 208773601 = 25316^2 + 14449^2 .

It is a cyclic number.

It is not a de Polignac number, because 849673457 - 2⁶ = 849673393 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 849673399 and 849673408.

It is not a weakly prime, because it can be changed into another prime (849673417) 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, 424836728 + 424836729.

It is an arithmetic number, because the mean of its divisors is an integer number (424836729).

Almost surely, 2^849673457 is an apocalyptic number.

It is an amenable number.

849673457 is a deficient number, since it is larger than the sum of its proper divisors (1).

849673457 is an equidigital number, since it uses as much as digits as its factorization.

849673457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5080320, while the sum is 53.

The square root of 849673457 is about 29149.1587700228. The cubic root of 849673457 is about 947.1469181933.

The spelling of 849673457 in words is "eight hundred forty-nine million, six hundred seventy-three thousand, four hundred fifty-seven".