84782641 has 4 divisors (see below), whose sum is σ = 84935412. Its totient is φ = 84629872.

The previous prime is 84782611. The next prime is 84782647. The reversal of 84782641 is 14628748.

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 5198400 + 79584241 = 2280^2 + 8921^2 .

It is a cyclic number.

It is not a de Polignac number, because 84782641 - 2⁵ = 84782609 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 84782594 and 84782603.

It is not an unprimeable number, because it can be changed into a prime (84782647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75550 + ... + 76663.

It is an arithmetic number, because the mean of its divisors is an integer number (21233853).

Almost surely, 2^84782641 is an apocalyptic number.

It is an amenable number.

84782641 is a deficient number, since it is larger than the sum of its proper divisors (152771).

84782641 is a wasteful number, since it uses less digits than its factorization.

84782641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152770.

The product of its digits is 86016, while the sum is 40.

The square root of 84782641 is about 9207.7489648665. The cubic root of 84782641 is about 439.3078667141.

The spelling of 84782641 in words is "eighty-four million, seven hundred eighty-two thousand, six hundred forty-one".