282623981 has 2 divisors, whose sum is σ = 282623982. Its totient is φ = 282623980.

The previous prime is 282623969. The next prime is 282624011. The reversal of 282623981 is 189326282.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 281098756 + 1525225 = 16766^2 + 1235^2 .

It is a cyclic number.

It is not a de Polignac number, because 282623981 - 2²⁶ = 215515117 is a prime.

It is a super-2 number, since 2×282623981² = 159752629272576722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (282623911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 141311990 + 141311991.

It is an arithmetic number, because the mean of its divisors is an integer number (141311991).

Almost surely, 2^282623981 is an apocalyptic number.

It is an amenable number.

282623981 is a deficient number, since it is larger than the sum of its proper divisors (1).

282623981 is an equidigital number, since it uses as much as digits as its factorization.

282623981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 82944, while the sum is 41.

The square root of 282623981 is about 16811.4241217096. The cubic root of 282623981 is about 656.2505340464.

The spelling of 282623981 in words is "two hundred eighty-two million, six hundred twenty-three thousand, nine hundred eighty-one".