393493226389 has 2 divisors, whose sum is σ = 393493226390. Its totient is φ = 393493226388.

The previous prime is 393493226383. The next prime is 393493226459. The reversal of 393493226389 is 983622394393.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 331842819364 + 61650407025 = 576058^2 + 248295^2 .

It is a cyclic number.

It is not a de Polignac number, because 393493226389 - 2⁷ = 393493226261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (393493226383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 196746613194 + 196746613195.

It is an arithmetic number, because the mean of its divisors is an integer number (196746613195).

Almost surely, 2^393493226389 is an apocalyptic number.

It is an amenable number.

393493226389 is a deficient number, since it is larger than the sum of its proper divisors (1).

393493226389 is an equidigital number, since it uses as much as digits as its factorization.

393493226389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 45349632, while the sum is 61.

The spelling of 393493226389 in words is "three hundred ninety-three billion, four hundred ninety-three million, two hundred twenty-six thousand, three hundred eighty-nine".