285942922621 has 2 divisors, whose sum is σ = 285942922622. Its totient is φ = 285942922620.

The previous prime is 285942922613. The next prime is 285942922651. The reversal of 285942922621 is 126229249582.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 215053860121 + 70889062500 = 463739^2 + 266250^2 .

It is a cyclic number.

It is not a de Polignac number, because 285942922621 - 2³ = 285942922613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (285942922651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142971461310 + 142971461311.

It is an arithmetic number, because the mean of its divisors is an integer number (142971461311).

Almost surely, 2^285942922621 is an apocalyptic number.

It is an amenable number.

285942922621 is a deficient number, since it is larger than the sum of its proper divisors (1).

285942922621 is an equidigital number, since it uses as much as digits as its factorization.

285942922621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2488320, while the sum is 52.

The spelling of 285942922621 in words is "two hundred eighty-five billion, nine hundred forty-two million, nine hundred twenty-two thousand, six hundred twenty-one".