234479981 has 2 divisors, whose sum is σ = 234479982. Its totient is φ = 234479980.

The previous prime is 234479953. The next prime is 234480013. The reversal of 234479981 is 189974432.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 137851081 + 96628900 = 11741^2 + 9830^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-234479981 is a prime.

It is a super-2 number, since 2×234479981² = 109961722979520722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (234479911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 117239990 + 117239991.

It is an arithmetic number, because the mean of its divisors is an integer number (117239991).

Almost surely, 2^234479981 is an apocalyptic number.

It is an amenable number.

234479981 is a deficient number, since it is larger than the sum of its proper divisors (1).

234479981 is an equidigital number, since it uses as much as digits as its factorization.

234479981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 435456, while the sum is 47.

The square root of 234479981 is about 15312.7391736423. The cubic root of 234479981 is about 616.6450600984.

The spelling of 234479981 in words is "two hundred thirty-four million, four hundred seventy-nine thousand, nine hundred eighty-one".