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85999999 = 373230563
BaseRepresentation
bin1010010000001…
…00000101111111
312222211020211011
411020010011333
5134003444444
612311140051
72062662601
oct510040577
9188736734
1085999999
11445aa088
1224974627
1314a81397
14b5c9171
15783b734
hex520417f

85999999 has 4 divisors (see below), whose sum is σ = 86230936. Its totient is φ = 85769064.

The previous prime is 85999937. The next prime is 86000009. The reversal of 85999999 is 99999958.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-85999999 is a prime.

It is a Duffinian number.

85999999 is a modest number, since divided by 9999 gives 8599 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85999399) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114909 + ... + 115654.

It is an arithmetic number, because the mean of its divisors is an integer number (21557734).

Almost surely, 285999999 is an apocalyptic number.

85999999 is a deficient number, since it is larger than the sum of its proper divisors (230937).

85999999 is a wasteful number, since it uses less digits than its factorization.

85999999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230936.

The product of its digits is 21257640, while the sum is 67.

The square root of 85999999 is about 9273.6184415793. The cubic root of 85999999 is about 441.4004945334.

The spelling of 85999999 in words is "eighty-five million, nine hundred ninety-nine thousand, nine hundred ninety-nine".

Divisors: 1 373 230563 85999999