283621661 has 2 divisors, whose sum is σ = 283621662. Its totient is φ = 283621660.

The previous prime is 283621633. The next prime is 283621669. The reversal of 283621661 is 166126382.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 279892900 + 3728761 = 16730^2 + 1931^2 .

It is a cyclic number.

It is not a de Polignac number, because 283621661 - 2¹⁰ = 283620637 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (283621669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 141810830 + 141810831.

It is an arithmetic number, because the mean of its divisors is an integer number (141810831).

Almost surely, 2^283621661 is an apocalyptic number.

It is an amenable number.

283621661 is a deficient number, since it is larger than the sum of its proper divisors (1).

283621661 is an equidigital number, since it uses as much as digits as its factorization.

283621661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20736, while the sum is 35.

The square root of 283621661 is about 16841.0706607389. The cubic root of 283621661 is about 657.0218287396.

The spelling of 283621661 in words is "two hundred eighty-three million, six hundred twenty-one thousand, six hundred sixty-one".