84000047 has 2 divisors, whose sum is σ = 84000048. Its totient is φ = 84000046.

The previous prime is 84000041. The next prime is 84000053. The reversal of 84000047 is 74000048.

It is a balanced prime because it is at equal distance from previous prime (84000041) and next prime (84000053).

It is a cyclic number.

It is not a de Polignac number, because 84000047 - 2¹⁴ = 83983663 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 83999986 and 84000031.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84000041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42000023 + 42000024.

It is an arithmetic number, because the mean of its divisors is an integer number (42000024).

Almost surely, 2^84000047 is an apocalyptic number.

84000047 is a deficient number, since it is larger than the sum of its proper divisors (1).

84000047 is an equidigital number, since it uses as much as digits as its factorization.

84000047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 896, while the sum is 23.

The square root of 84000047 is about 9165.1539539715. The cubic root of 84000047 is about 437.9519956703.

Subtracting from 84000047 its reverse (74000048), we obtain a palindrome (9999999).

The spelling of 84000047 in words is "eighty-four million, forty-seven", and thus it is an aban number.