86851705 has 4 divisors (see below), whose sum is σ = 104222052. Its totient is φ = 69481360.

The previous prime is 86851669. The next prime is 86851729. The reversal of 86851705 is 50715868.

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 23155344 + 63696361 = 4812^2 + 7981^2 .

It is not a de Polignac number, because 86851705 - 2¹³ = 86843513 is a prime.

It is a super-2 number, since 2×86851705² = 15086437322814050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8685166 + ... + 8685175.

It is an arithmetic number, because the mean of its divisors is an integer number (26055513).

Almost surely, 2^86851705 is an apocalyptic number.

It is an amenable number.

86851705 is a deficient number, since it is larger than the sum of its proper divisors (17370347).

86851705 is a wasteful number, since it uses less digits than its factorization.

86851705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17370346.

The product of its (nonzero) digits is 67200, while the sum is 40.

The square root of 86851705 is about 9319.4262162431. The cubic root of 86851705 is about 442.8528556891.

The spelling of 86851705 in words is "eighty-six million, eight hundred fifty-one thousand, seven hundred five".