84947121 has 24 divisors (see below), whose sum is σ = 143654784. Its totient is φ = 47355840.

The previous prime is 84947117. The next prime is 84947131. The reversal of 84947121 is 12174948.

It is not a de Polignac number, because 84947121 - 2² = 84947117 is a prime.

It is not an unprimeable number, because it can be changed into a prime (84947111) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13861 + ... + 19026.

It is an arithmetic number, because the mean of its divisors is an integer number (5985616).

Almost surely, 2^84947121 is an apocalyptic number.

It is an amenable number.

84947121 is a deficient number, since it is larger than the sum of its proper divisors (58707663).

84947121 is a wasteful number, since it uses less digits than its factorization.

84947121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32941 (or 32938 counting only the distinct ones).

The product of its digits is 16128, while the sum is 36.

The square root of 84947121 is about 9216.6762447208. The cubic root of 84947121 is about 439.5917718487.

The spelling of 84947121 in words is "eighty-four million, nine hundred forty-seven thousand, one hundred twenty-one".