84871641 has 4 divisors (see below), whose sum is σ = 113162192. Its totient is φ = 56581092.

The previous prime is 84871639. The next prime is 84871643. The reversal of 84871641 is 14617848.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (84871639) and next prime (84871643).

It is not a de Polignac number, because 84871641 - 2¹ = 84871639 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 84871641.

It is not an unprimeable number, because it can be changed into a prime (84871643) 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, 14145271 + ... + 14145276.

It is an arithmetic number, because the mean of its divisors is an integer number (28290548).

Almost surely, 2^84871641 is an apocalyptic number.

It is an amenable number.

84871641 is a deficient number, since it is larger than the sum of its proper divisors (28290551).

84871641 is a wasteful number, since it uses less digits than its factorization.

84871641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28290550.

The product of its digits is 43008, while the sum is 39.

The square root of 84871641 is about 9212.5805830940. The cubic root of 84871641 is about 439.4615331037.

The spelling of 84871641 in words is "eighty-four million, eight hundred seventy-one thousand, six hundred forty-one".