234388681 has 2 divisors, whose sum is σ = 234388682. Its totient is φ = 234388680.

The previous prime is 234388669. The next prime is 234388691. The reversal of 234388681 is 186883432.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 222278281 + 12110400 = 14909^2 + 3480^2 .

It is a cyclic number.

It is not a de Polignac number, because 234388681 - 2¹⁷ = 234257609 is a prime.

It is a super-2 number, since 2×234388681² = 109876107561839522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (234388601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 117194340 + 117194341.

It is an arithmetic number, because the mean of its divisors is an integer number (117194341).

Almost surely, 2^234388681 is an apocalyptic number.

It is an amenable number.

234388681 is a deficient number, since it is larger than the sum of its proper divisors (1).

234388681 is an equidigital number, since it uses as much as digits as its factorization.

234388681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 221184, while the sum is 43.

The square root of 234388681 is about 15309.7577054635. The cubic root of 234388681 is about 616.5650148816.

The spelling of 234388681 in words is "two hundred thirty-four million, three hundred eighty-eight thousand, six hundred eighty-one".