85249905 has 32 divisors (see below), whose sum is σ = 148439424. Its totient is φ = 41527296.

The previous prime is 85249897. The next prime is 85249921. The reversal of 85249905 is 50994258.

It is not a de Polignac number, because 85249905 - 2³ = 85249897 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16662 + ... + 21168.

It is an arithmetic number, because the mean of its divisors is an integer number (4638732).

Almost surely, 2^85249905 is an apocalyptic number.

It is an amenable number.

85249905 is a deficient number, since it is larger than the sum of its proper divisors (63189519).

85249905 is a wasteful number, since it uses less digits than its factorization.

85249905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4625.

The product of its (nonzero) digits is 129600, while the sum is 42.

The square root of 85249905 is about 9233.0875117698. The cubic root of 85249905 is about 440.1134435449.

The spelling of 85249905 in words is "eighty-five million, two hundred forty-nine thousand, nine hundred five".