234640423 has 2 divisors, whose sum is σ = 234640424. Its totient is φ = 234640422.

The previous prime is 234640391. The next prime is 234640429. The reversal of 234640423 is 324046432.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 234640423 - 2⁵ = 234640391 is a prime.

It is a super-3 number, since 3×234640423³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 234640391 and 234640400.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (234640429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 117320211 + 117320212.

It is an arithmetic number, because the mean of its divisors is an integer number (117320212).

Almost surely, 2^234640423 is an apocalyptic number.

234640423 is a deficient number, since it is larger than the sum of its proper divisors (1).

234640423 is an equidigital number, since it uses as much as digits as its factorization.

234640423 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824, while the sum is 28.

The square root of 234640423 is about 15317.9771184057. The cubic root of 234640423 is about 616.7856736800.

Adding to 234640423 its reverse (324046432), we get a palindrome (558686855).

The spelling of 234640423 in words is "two hundred thirty-four million, six hundred forty thousand, four hundred twenty-three".