234239021 has 2 divisors, whose sum is σ = 234239022. Its totient is φ = 234239020.

The previous prime is 234238999. The next prime is 234239041. The reversal of 234239021 is 120932432.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 121242121 + 112996900 = 11011^2 + 10630^2 .

It is a cyclic number.

It is not a de Polignac number, because 234239021 - 2⁶ = 234238957 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (234239041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 117119510 + 117119511.

It is an arithmetic number, because the mean of its divisors is an integer number (117119511).

Almost surely, 2^234239021 is an apocalyptic number.

It is an amenable number.

234239021 is a deficient number, since it is larger than the sum of its proper divisors (1).

234239021 is an equidigital number, since it uses as much as digits as its factorization.

234239021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 234239021 is about 15304.8691925152. The cubic root of 234239021 is about 616.4337588751.

The spelling of 234239021 in words is "two hundred thirty-four million, two hundred thirty-nine thousand, twenty-one".