849873257 has 2 divisors, whose sum is σ = 849873258. Its totient is φ = 849873256.

The previous prime is 849873251. The next prime is 849873301. The reversal of 849873257 is 752378948.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 681418816 + 168454441 = 26104^2 + 12979^2 .

It is a cyclic number.

It is not a de Polignac number, because 849873257 - 2⁸ = 849873001 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 849873199 and 849873208.

It is not a weakly prime, because it can be changed into another prime (849873251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 424936628 + 424936629.

It is an arithmetic number, because the mean of its divisors is an integer number (424936629).

Almost surely, 2^849873257 is an apocalyptic number.

It is an amenable number.

849873257 is a deficient number, since it is larger than the sum of its proper divisors (1).

849873257 is an equidigital number, since it uses as much as digits as its factorization.

849873257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3386880, while the sum is 53.

The square root of 849873257 is about 29152.5857686758. The cubic root of 849873257 is about 947.2211526424.

The spelling of 849873257 in words is "eight hundred forty-nine million, eight hundred seventy-three thousand, two hundred fifty-seven".