84821955 has 32 divisors (see below), whose sum is σ = 141177600. Its totient is φ = 43435392.

The previous prime is 84821927. The next prime is 84821987. The reversal of 84821955 is 55912848.

It is a happy number.

It is not a de Polignac number, because 84821955 - 2⁵ = 84821923 is a prime.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 98316 + ... + 99174.

It is an arithmetic number, because the mean of its divisors is an integer number (4411800).

Almost surely, 2^84821955 is an apocalyptic number.

84821955 is a deficient number, since it is larger than the sum of its proper divisors (56355645).

84821955 is a wasteful number, since it uses less digits than its factorization.

84821955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1123.

The product of its digits is 115200, while the sum is 42.

The square root of 84821955 is about 9209.8835497524. The cubic root of 84821955 is about 439.3757590736.

The spelling of 84821955 in words is "eighty-four million, eight hundred twenty-one thousand, nine hundred fifty-five".