233011993 has 2 divisors, whose sum is σ = 233011994. Its totient is φ = 233011992.

The previous prime is 233011973. The next prime is 233012023. The reversal of 233011993 is 399110332.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 202009369 + 31002624 = 14213^2 + 5568^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-233011993 is a prime.

It is equal to p_12799030 and since 233011993 and 12799030 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (233011963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 116505996 + 116505997.

It is an arithmetic number, because the mean of its divisors is an integer number (116505997).

Almost surely, 2^233011993 is an apocalyptic number.

It is an amenable number.

233011993 is a deficient number, since it is larger than the sum of its proper divisors (1).

233011993 is an equidigital number, since it uses as much as digits as its factorization.

233011993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4374, while the sum is 31.

The square root of 233011993 is about 15264.7303611954. The cubic root of 233011993 is about 615.3555068848.

The spelling of 233011993 in words is "two hundred thirty-three million, eleven thousand, nine hundred ninety-three".