233242409 has 2 divisors, whose sum is σ = 233242410. Its totient is φ = 233242408.

The previous prime is 233242393. The next prime is 233242411. The reversal of 233242409 is 904242332.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 168922009 + 64320400 = 12997^2 + 8020^2 .

It is a cyclic number.

It is not a de Polignac number, because 233242409 - 2⁴ = 233242393 is a prime.

It is a super-2 number, since 2×233242409² = 108804042712246562, which contains 22 as substring.

Together with 233242411, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_12810881 and since 233242409 and 12810881 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 (233242439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 116621204 + 116621205.

It is an arithmetic number, because the mean of its divisors is an integer number (116621205).

Almost surely, 2^233242409 is an apocalyptic number.

It is an amenable number.

233242409 is a deficient number, since it is larger than the sum of its proper divisors (1).

233242409 is an equidigital number, since it uses as much as digits as its factorization.

233242409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 29.

The square root of 233242409 is about 15272.2758290963. The cubic root of 233242409 is about 615.5582733351.

The spelling of 233242409 in words is "two hundred thirty-three million, two hundred forty-two thousand, four hundred nine".