84012147 has 28 divisors (see below), whose sum is σ = 133389720. Its totient is φ = 52705728.

The previous prime is 84012143. The next prime is 84012209. The reversal of 84012147 is 74121048.

It is not a de Polignac number, because 84012147 - 2² = 84012143 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 84012147.

It is not an unprimeable number, because it can be changed into a prime (84012143) 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 27 ways as a sum of consecutive naturals, for example, 9004 + ... + 15782.

Almost surely, 2^84012147 is an apocalyptic number.

84012147 is a deficient number, since it is larger than the sum of its proper divisors (49377573).

84012147 is an equidigital number, since it uses as much as digits as its factorization.

84012147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6814 (or 6799 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 27.

The square root of 84012147 is about 9165.8140391348. The cubic root of 84012147 is about 437.9730232963.

The spelling of 84012147 in words is "eighty-four million, twelve thousand, one hundred forty-seven".