834886384921 has 2 divisors, whose sum is σ = 834886384922. Its totient is φ = 834886384920.

The previous prime is 834886384903. The next prime is 834886384933. The reversal of 834886384921 is 129483688438.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 711256089600 + 123630295321 = 843360^2 + 351611^2 .

It is a cyclic number.

It is not a de Polignac number, because 834886384921 - 2²⁵ = 834852830489 is a prime.

It is not a weakly prime, because it can be changed into another prime (834886384421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 417443192460 + 417443192461.

It is an arithmetic number, because the mean of its divisors is an integer number (417443192461).

Almost surely, 2^834886384921 is an apocalyptic number.

It is an amenable number.

834886384921 is a deficient number, since it is larger than the sum of its proper divisors (1).

834886384921 is an equidigital number, since it uses as much as digits as its factorization.

834886384921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 63700992, while the sum is 64.

The spelling of 834886384921 in words is "eight hundred thirty-four billion, eight hundred eighty-six million, three hundred eighty-four thousand, nine hundred twenty-one".