283984021 has 2 divisors, whose sum is σ = 283984022. Its totient is φ = 283984020.

The previous prime is 283984007. The next prime is 283984049. The reversal of 283984021 is 120489382.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 217887121 + 66096900 = 14761^2 + 8130^2 .

It is a cyclic number.

It is not a de Polignac number, because 283984021 - 2⁹ = 283983509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (283984121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 141992010 + 141992011.

It is an arithmetic number, because the mean of its divisors is an integer number (141992011).

Almost surely, 2^283984021 is an apocalyptic number.

It is an amenable number.

283984021 is a deficient number, since it is larger than the sum of its proper divisors (1).

283984021 is an equidigital number, since it uses as much as digits as its factorization.

283984021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 283984021 is about 16851.8254500811. The cubic root of 283984021 is about 657.3015171925.

The spelling of 283984021 in words is "two hundred eighty-three million, nine hundred eighty-four thousand, twenty-one".