233985879821 has 2 divisors, whose sum is σ = 233985879822. Its totient is φ = 233985879820.

The previous prime is 233985879793. The next prime is 233985879859. The reversal of 233985879821 is 128978589332.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 203031348100 + 30954531721 = 450590^2 + 175939^2 .

It is a cyclic number.

It is not a de Polignac number, because 233985879821 - 2³⁴ = 216806010637 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (233985879221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 116992939910 + 116992939911.

It is an arithmetic number, because the mean of its divisors is an integer number (116992939911).

Almost surely, 2^233985879821 is an apocalyptic number.

It is an amenable number.

233985879821 is a deficient number, since it is larger than the sum of its proper divisors (1).

233985879821 is an equidigital number, since it uses as much as digits as its factorization.

233985879821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 52254720, while the sum is 65.

The spelling of 233985879821 in words is "two hundred thirty-three billion, nine hundred eighty-five million, eight hundred seventy-nine thousand, eight hundred twenty-one".