233030981 has 2 divisors, whose sum is σ = 233030982. Its totient is φ = 233030980.

The previous prime is 233030977. The next prime is 233031013. The reversal of 233030981 is 189030332.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 211557025 + 21473956 = 14545^2 + 4634^2 .

It is a cyclic number.

It is not a de Polignac number, because 233030981 - 2² = 233030977 is a prime.

It is a super-2 number, since 2×233030981² = 108606876211644722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (233030911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 116515490 + 116515491.

It is an arithmetic number, because the mean of its divisors is an integer number (116515491).

Almost surely, 2^233030981 is an apocalyptic number.

It is an amenable number.

233030981 is a deficient number, since it is larger than the sum of its proper divisors (1).

233030981 is an equidigital number, since it uses as much as digits as its factorization.

233030981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 233030981 is about 15265.3523051386. The cubic root of 233030981 is about 615.3722214078.

The spelling of 233030981 in words is "two hundred thirty-three million, thirty thousand, nine hundred eighty-one".