84120017 has 8 divisors (see below), whose sum is σ = 86722080. Its totient is φ = 81557280.

The previous prime is 84120013. The next prime is 84120031. The reversal of 84120017 is 71002148.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 84120017 - 2² = 84120013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 84119974 and 84120001.

It is not an unprimeable number, because it can be changed into a prime (84120013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5459 + ... + 14072.

It is an arithmetic number, because the mean of its divisors is an integer number (10840260).

Almost surely, 2^84120017 is an apocalyptic number.

It is an amenable number.

84120017 is a deficient number, since it is larger than the sum of its proper divisors (2602063).

84120017 is a wasteful number, since it uses less digits than its factorization.

84120017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19663.

The product of its (nonzero) digits is 448, while the sum is 23.

The square root of 84120017 is about 9171.6965170027. The cubic root of 84120017 is about 438.1603928054.

The spelling of 84120017 in words is "eighty-four million, one hundred twenty thousand, seventeen".