84211971 has 8 divisors (see below), whose sum is σ = 118192320. Its totient is φ = 53186472.

The previous prime is 84211957. The next prime is 84211973. The reversal of 84211971 is 17911248.

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

It is not a de Polignac number, because 84211971 - 2⁷ = 84211843 is a prime.

It is not an unprimeable number, because it can be changed into a prime (84211973) 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, 738645 + ... + 738758.

It is an arithmetic number, because the mean of its divisors is an integer number (14774040).

Almost surely, 2^84211971 is an apocalyptic number.

84211971 is a deficient number, since it is larger than the sum of its proper divisors (33980349).

84211971 is a wasteful number, since it uses less digits than its factorization.

84211971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1477425.

The product of its digits is 4032, while the sum is 33.

The square root of 84211971 is about 9176.7080698909. The cubic root of 84211971 is about 438.3199898913.

The spelling of 84211971 in words is "eighty-four million, two hundred eleven thousand, nine hundred seventy-one".