393938749033 has 2 divisors, whose sum is σ = 393938749034. Its totient is φ = 393938749032.

The previous prime is 393938748971. The next prime is 393938749067. The reversal of 393938749033 is 330947839393.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 383107767849 + 10830981184 = 618957^2 + 104072^2 .

It is a cyclic number.

It is not a de Polignac number, because 393938749033 - 2²¹ = 393936651881 is a prime.

It is not a weakly prime, because it can be changed into another prime (393938749333) 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, 196969374516 + 196969374517.

It is an arithmetic number, because the mean of its divisors is an integer number (196969374517).

Almost surely, 2^393938749033 is an apocalyptic number.

It is an amenable number.

393938749033 is a deficient number, since it is larger than the sum of its proper divisors (1).

393938749033 is an equidigital number, since it uses as much as digits as its factorization.

393938749033 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 39680928, while the sum is 61.

The spelling of 393938749033 in words is "three hundred ninety-three billion, nine hundred thirty-eight million, seven hundred forty-nine thousand, thirty-three".