84312745 has 16 divisors (see below), whose sum is σ = 110700288. Its totient is φ = 61136640.

The previous prime is 84312743. The next prime is 84312749. The reversal of 84312745 is 54721348.

It is not a de Polignac number, because 84312745 - 2¹ = 84312743 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 84312745.

It is not an unprimeable number, because it can be changed into a prime (84312743) 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, 18097 + ... + 22273.

It is an arithmetic number, because the mean of its divisors is an integer number (6918768).

Almost surely, 2^84312745 is an apocalyptic number.

It is an amenable number.

84312745 is a deficient number, since it is larger than the sum of its proper divisors (26387543).

84312745 is a wasteful number, since it uses less digits than its factorization.

84312745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4560.

The product of its digits is 26880, while the sum is 34.

The square root of 84312745 is about 9182.1971771467. The cubic root of 84312745 is about 438.4947617611.

The spelling of 84312745 in words is "eighty-four million, three hundred twelve thousand, seven hundred forty-five".