393942329093 has 2 divisors, whose sum is σ = 393942329094. Its totient is φ = 393942329092.

The previous prime is 393942329071. The next prime is 393942329107. The reversal of 393942329093 is 390923249393.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 335823727009 + 58118602084 = 579503^2 + 241078^2 .

It is a cyclic number.

It is not a de Polignac number, because 393942329093 - 2¹⁰ = 393942328069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (393942329003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 196971164546 + 196971164547.

It is an arithmetic number, because the mean of its divisors is an integer number (196971164547).

Almost surely, 2^393942329093 is an apocalyptic number.

It is an amenable number.

393942329093 is a deficient number, since it is larger than the sum of its proper divisors (1).

393942329093 is an equidigital number, since it uses as much as digits as its factorization.

393942329093 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8503056, while the sum is 56.

The spelling of 393942329093 in words is "three hundred ninety-three billion, nine hundred forty-two million, three hundred twenty-nine thousand, ninety-three".