84631121 has 4 divisors (see below), whose sum is σ = 85191744. Its totient is φ = 84070500.

The previous prime is 84631097. The next prime is 84631133. The reversal of 84631121 is 12113648.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 84631121 - 2¹⁴ = 84614737 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (84631171) 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 3 ways as a sum of consecutive naturals, for example, 280085 + ... + 280386.

It is an arithmetic number, because the mean of its divisors is an integer number (21297936).

Almost surely, 2^84631121 is an apocalyptic number.

It is an amenable number.

84631121 is a deficient number, since it is larger than the sum of its proper divisors (560623).

84631121 is a wasteful number, since it uses less digits than its factorization.

84631121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 560622.

The product of its digits is 1152, while the sum is 26.

The square root of 84631121 is about 9199.5174329961. The cubic root of 84631121 is about 439.0460064244.

Adding to 84631121 its reverse (12113648), we get a palindrome (96744769).

The spelling of 84631121 in words is "eighty-four million, six hundred thirty-one thousand, one hundred twenty-one".