86851905 has 16 divisors (see below), whose sum is σ = 158815104. Its totient is φ = 39703680.

The previous prime is 86851903. The next prime is 86851909. The reversal of 86851905 is 50915868.

It is not a de Polignac number, because 86851905 - 2¹ = 86851903 is a prime.

It is not an unprimeable number, because it can be changed into a prime (86851903) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 413476 + ... + 413685.

It is an arithmetic number, because the mean of its divisors is an integer number (9925944).

Almost surely, 2^86851905 is an apocalyptic number.

It is an amenable number.

86851905 is a deficient number, since it is larger than the sum of its proper divisors (71963199).

86851905 is a wasteful number, since it uses less digits than its factorization.

86851905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 827176.

The product of its (nonzero) digits is 86400, while the sum is 42.

The square root of 86851905 is about 9319.4369465113. The cubic root of 86851905 is about 442.8531956191.

The spelling of 86851905 in words is "eighty-six million, eight hundred fifty-one thousand, nine hundred five".