831418121 has 2 divisors, whose sum is σ = 831418122. Its totient is φ = 831418120.

The previous prime is 831418117. The next prime is 831418123. The reversal of 831418121 is 121814138.

831418121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 653569225 + 177848896 = 25565^2 + 13336^2 .

It is a cyclic number.

It is not a de Polignac number, because 831418121 - 2² = 831418117 is a prime.

Together with 831418123, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (831418123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 415709060 + 415709061.

It is an arithmetic number, because the mean of its divisors is an integer number (415709061).

Almost surely, 2^831418121 is an apocalyptic number.

It is an amenable number.

831418121 is a deficient number, since it is larger than the sum of its proper divisors (1).

831418121 is an equidigital number, since it uses as much as digits as its factorization.

831418121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1536, while the sum is 29.

The square root of 831418121 is about 28834.3219271756. The cubic root of 831418121 is about 940.3145623704.

The spelling of 831418121 in words is "eight hundred thirty-one million, four hundred eighteen thousand, one hundred twenty-one".