849725705 has 16 divisors (see below), whose sum is σ = 1082586384. Its totient is φ = 638054400.

The previous prime is 849725689. The next prime is 849725713. The reversal of 849725705 is 507527948.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 61504 + 849664201 = 248^2 + 29149^2 .

It is not a de Polignac number, because 849725705 - 2⁴ = 849725689 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 849725705.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18305 + ... + 45105.

It is an arithmetic number, because the mean of its divisors is an integer number (67661649).

Almost surely, 2^849725705 is an apocalyptic number.

849725705 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

849725705 is a deficient number, since it is larger than the sum of its proper divisors (232860679).

849725705 is a wasteful number, since it uses less digits than its factorization.

849725705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27196.

The product of its (nonzero) digits is 705600, while the sum is 47.

The square root of 849725705 is about 29150.0549742192. The cubic root of 849725705 is about 947.1663317368.

The spelling of 849725705 in words is "eight hundred forty-nine million, seven hundred twenty-five thousand, seven hundred five".