851705101 has 4 divisors (see below), whose sum is σ = 917220892. Its totient is φ = 786189312.

The previous prime is 851705027. The next prime is 851705131. The reversal of 851705101 is 101507158.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 414936900 + 436768201 = 20370^2 + 20899^2 .

It is a cyclic number.

It is not a de Polignac number, because 851705101 - 2¹⁵ = 851672333 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 851705101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (851705131) 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 in 3 ways as a sum of consecutive naturals, for example, 32757876 + ... + 32757901.

It is an arithmetic number, because the mean of its divisors is an integer number (229305223).

Almost surely, 2^851705101 is an apocalyptic number.

It is an amenable number.

851705101 is a deficient number, since it is larger than the sum of its proper divisors (65515791).

851705101 is a wasteful number, since it uses less digits than its factorization.

851705101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65515790.

The product of its (nonzero) digits is 1400, while the sum is 28.

The square root of 851705101 is about 29183.9870648272. The cubic root of 851705101 is about 947.9012211849.

The spelling of 851705101 in words is "eight hundred fifty-one million, seven hundred five thousand, one hundred one".