283981813 has 2 divisors, whose sum is σ = 283981814. Its totient is φ = 283981812.

The previous prime is 283981811. The next prime is 283981837. The reversal of 283981813 is 318189382.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 280964644 + 3017169 = 16762^2 + 1737^2 .

It is a cyclic number.

It is not a de Polignac number, because 283981813 - 2¹ = 283981811 is a prime.

It is a super-2 number, since 2×283981813² = 161291340229533938, which contains 22 as substring.

Together with 283981811, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 283981813.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (283981811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 141990906 + 141990907.

It is an arithmetic number, because the mean of its divisors is an integer number (141990907).

Almost surely, 2^283981813 is an apocalyptic number.

It is an amenable number.

283981813 is a deficient number, since it is larger than the sum of its proper divisors (1).

283981813 is an equidigital number, since it uses as much as digits as its factorization.

283981813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 82944, while the sum is 43.

The square root of 283981813 is about 16851.7599377632. The cubic root of 283981813 is about 657.2998136629.

The spelling of 283981813 in words is "two hundred eighty-three million, nine hundred eighty-one thousand, eight hundred thirteen".