234743981 has 2 divisors, whose sum is σ = 234743982. Its totient is φ = 234743980.

The previous prime is 234743969. The next prime is 234744011. The reversal of 234743981 is 189347432.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 192376900 + 42367081 = 13870^2 + 6509^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-234743981 is a prime.

It is a super-2 number, since 2×234743981² = 110209473231456722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (234743581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 117371990 + 117371991.

It is an arithmetic number, because the mean of its divisors is an integer number (117371991).

Almost surely, 2^234743981 is an apocalyptic number.

It is an amenable number.

234743981 is a deficient number, since it is larger than the sum of its proper divisors (1).

234743981 is an equidigital number, since it uses as much as digits as its factorization.

234743981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145152, while the sum is 41.

The square root of 234743981 is about 15321.3570221440. The cubic root of 234743981 is about 616.8763993040.

The spelling of 234743981 in words is "two hundred thirty-four million, seven hundred forty-three thousand, nine hundred eighty-one".