233081993 has 2 divisors, whose sum is σ = 233081994. Its totient is φ = 233081992.

The previous prime is 233081983. The next prime is 233081999. The reversal of 233081993 is 399180332.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 139901584 + 93180409 = 11828^2 + 9653^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-233081993 is a prime.

It is not a weakly prime, because it can be changed into another prime (233081999) 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, 116540996 + 116540997.

It is an arithmetic number, because the mean of its divisors is an integer number (116540997).

Almost surely, 2^233081993 is an apocalyptic number.

It is an amenable number.

233081993 is a deficient number, since it is larger than the sum of its proper divisors (1).

233081993 is an equidigital number, since it uses as much as digits as its factorization.

233081993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34992, while the sum is 38.

The square root of 233081993 is about 15267.0230562477. The cubic root of 233081993 is about 615.4171211279.

The spelling of 233081993 in words is "two hundred thirty-three million, eighty-one thousand, nine hundred ninety-three".