84019745 has 4 divisors (see below), whose sum is σ = 100823700. Its totient is φ = 67215792.

The previous prime is 84019723. The next prime is 84019777. The reversal of 84019745 is 54791048.

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

It can be written as a sum of positive squares in 2 ways, for example, as 42081169 + 41938576 = 6487^2 + 6476^2 .

It is a cyclic number.

It is not a de Polignac number, because 84019745 - 2¹⁰ = 84018721 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 84019699 and 84019708.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8401970 + ... + 8401979.

It is an arithmetic number, because the mean of its divisors is an integer number (25205925).

Almost surely, 2^84019745 is an apocalyptic number.

It is an amenable number.

84019745 is a deficient number, since it is larger than the sum of its proper divisors (16803955).

84019745 is a wasteful number, since it uses less digits than its factorization.

84019745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16803954.

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 84019745 is about 9166.2285046796. The cubic root of 84019745 is about 437.9862262232.

The spelling of 84019745 in words is "eighty-four million, nineteen thousand, seven hundred forty-five".