84821847 has 12 divisors (see below), whose sum is σ = 124312440. Its totient is φ = 51406960.

The previous prime is 84821837. The next prime is 84821851. The reversal of 84821847 is 74812848.

It is not a de Polignac number, because 84821847 - 2¹⁴ = 84805463 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 84821799 and 84821808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84821827) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 116472 + ... + 117197.

It is an arithmetic number, because the mean of its divisors is an integer number (10359370).

Almost surely, 2^84821847 is an apocalyptic number.

84821847 is a deficient number, since it is larger than the sum of its proper divisors (39490593).

84821847 is a wasteful number, since it uses less digits than its factorization.

84821847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233694 (or 233683 counting only the distinct ones).

The product of its digits is 114688, while the sum is 42.

The square root of 84821847 is about 9209.8776864842. The cubic root of 84821847 is about 439.3755725944.

The spelling of 84821847 in words is "eighty-four million, eight hundred twenty-one thousand, eight hundred forty-seven".