234343721 has 2 divisors, whose sum is σ = 234343722. Its totient is φ = 234343720.

The previous prime is 234343717. The next prime is 234343763. The reversal of 234343721 is 127343432.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 210685225 + 23658496 = 14515^2 + 4864^2 .

It is a cyclic number.

It is not a de Polignac number, because 234343721 - 2² = 234343717 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (234343771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 117171860 + 117171861.

It is an arithmetic number, because the mean of its divisors is an integer number (117171861).

Almost surely, 2^234343721 is an apocalyptic number.

It is an amenable number.

234343721 is a deficient number, since it is larger than the sum of its proper divisors (1).

234343721 is an equidigital number, since it uses as much as digits as its factorization.

234343721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12096, while the sum is 29.

The square root of 234343721 is about 15308.2892904465. The cubic root of 234343721 is about 616.5255895766.

It can be divided in two parts, 2343 and 43721, that added together give a palindrome (46064).

The spelling of 234343721 in words is "two hundred thirty-four million, three hundred forty-three thousand, seven hundred twenty-one".