233321993 has 2 divisors, whose sum is σ = 233321994. Its totient is φ = 233321992.

The previous prime is 233321969. The next prime is 233322007. The reversal of 233321993 is 399123332.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 193543744 + 39778249 = 13912^2 + 6307^2 .

It is a cyclic number.

It is not a de Polignac number, because 233321993 - 2⁶ = 233321929 is a prime.

It is equal to p_12814982 and since 233321993 and 12814982 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 (233321093) 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 as a sum of consecutive naturals, namely, 116660996 + 116660997.

It is an arithmetic number, because the mean of its divisors is an integer number (116660997).

Almost surely, 2^233321993 is an apocalyptic number.

It is an amenable number.

233321993 is a deficient number, since it is larger than the sum of its proper divisors (1).

233321993 is an equidigital number, since it uses as much as digits as its factorization.

233321993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26244, while the sum is 35.

The square root of 233321993 is about 15274.8811124670. The cubic root of 233321993 is about 615.6282763549.

The spelling of 233321993 in words is "two hundred thirty-three million, three hundred twenty-one thousand, nine hundred ninety-three".