233243993 has 4 divisors (see below), whose sum is σ = 233307600. Its totient is φ = 233180388.

The previous prime is 233243971. The next prime is 233244023. The reversal of 233243993 is 399342332.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 233243993 - 2⁶ = 233243929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (233243693) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25943 + ... + 33756.

It is an arithmetic number, because the mean of its divisors is an integer number (58326900).

Almost surely, 2^233243993 is an apocalyptic number.

It is an amenable number.

233243993 is a deficient number, since it is larger than the sum of its proper divisors (63607).

233243993 is an equidigital number, since it uses as much as digits as its factorization.

233243993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63606.

The product of its digits is 104976, while the sum is 38.

The square root of 233243993 is about 15272.3276876840. The cubic root of 233243993 is about 615.5596667954.

The spelling of 233243993 in words is "two hundred thirty-three million, two hundred forty-three thousand, nine hundred ninety-three".