84512005 has 8 divisors (see below), whose sum is σ = 105823872. Its totient is φ = 64669968.

The previous prime is 84511993. The next prime is 84512009. The reversal of 84512005 is 50021548.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 84512005 - 2¹³ = 84503813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84512009) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 367329 + ... + 367558.

It is an arithmetic number, because the mean of its divisors is an integer number (13227984).

Almost surely, 2^84512005 is an apocalyptic number.

It is an amenable number.

84512005 is a deficient number, since it is larger than the sum of its proper divisors (21311867).

84512005 is a wasteful number, since it uses less digits than its factorization.

84512005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 734915.

The product of its (nonzero) digits is 1600, while the sum is 25.

The square root of 84512005 is about 9193.0411181502. The cubic root of 84512005 is about 438.8399279416.

It can be divided in two parts, 845 and 12005, that multiplied together give a square (10144225 = 3185²).

The spelling of 84512005 in words is "eighty-four million, five hundred twelve thousand, five".