233320991 has 2 divisors, whose sum is σ = 233320992. Its totient is φ = 233320990.

The previous prime is 233320963. The next prime is 233321021. The reversal of 233320991 is 199023332.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 233320991 - 2¹⁰ = 233319967 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (233320961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 116660495 + 116660496.

It is an arithmetic number, because the mean of its divisors is an integer number (116660496).

Almost surely, 2^233320991 is an apocalyptic number.

233320991 is a deficient number, since it is larger than the sum of its proper divisors (1).

233320991 is an equidigital number, since it uses as much as digits as its factorization.

233320991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8748, while the sum is 32.

The square root of 233320991 is about 15274.8483134858. The cubic root of 233320991 is about 615.6273950829.

The spelling of 233320991 in words is "two hundred thirty-three million, three hundred twenty thousand, nine hundred ninety-one".