393281362861 has 2 divisors, whose sum is σ = 393281362862. Its totient is φ = 393281362860.

The previous prime is 393281362841. The next prime is 393281362891. The reversal of 393281362861 is 168263182393.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 385976412900 + 7304949961 = 621270^2 + 85469^2 .

It is a cyclic number.

It is not a de Polignac number, because 393281362861 - 2¹⁷ = 393281231789 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 393281362799 and 393281362808.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (393281362841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 196640681430 + 196640681431.

It is an arithmetic number, because the mean of its divisors is an integer number (196640681431).

Almost surely, 2^393281362861 is an apocalyptic number.

It is an amenable number.

393281362861 is a deficient number, since it is larger than the sum of its proper divisors (1).

393281362861 is an equidigital number, since it uses as much as digits as its factorization.

393281362861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2239488, while the sum is 52.

The spelling of 393281362861 in words is "three hundred ninety-three billion, two hundred eighty-one million, three hundred sixty-two thousand, eight hundred sixty-one".