234434021 has 2 divisors, whose sum is σ = 234434022. Its totient is φ = 234434020.

The previous prime is 234434003. The next prime is 234434033. The reversal of 234434021 is 120434432.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 231496225 + 2937796 = 15215^2 + 1714^2 .

It is a cyclic number.

It is not a de Polignac number, because 234434021 - 2⁶ = 234433957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (234434071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 117217010 + 117217011.

It is an arithmetic number, because the mean of its divisors is an integer number (117217011).

Almost surely, 2^234434021 is an apocalyptic number.

It is an amenable number.

234434021 is a deficient number, since it is larger than the sum of its proper divisors (1).

234434021 is an equidigital number, since it uses as much as digits as its factorization.

234434021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 234434021 is about 15311.2383888437. The cubic root of 234434021 is about 616.6047683022.

Adding to 234434021 its reverse (120434432), we get a palindrome (354868453).

The spelling of 234434021 in words is "two hundred thirty-four million, four hundred thirty-four thousand, twenty-one".