393924689933 has 2 divisors, whose sum is σ = 393924689934. Its totient is φ = 393924689932.

The previous prime is 393924689909. The next prime is 393924689957. The reversal of 393924689933 is 339986429393.

It is a balanced prime because it is at equal distance from previous prime (393924689909) and next prime (393924689957).

It can be written as a sum of positive squares in only one way, i.e., 377293234564 + 16631455369 = 614242^2 + 128963^2 .

It is a cyclic number.

It is not a de Polignac number, because 393924689933 - 2¹⁰ = 393924688909 is a prime.

It is a super-2 number, since 2×393924689933² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (393924689233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 196962344966 + 196962344967.

It is an arithmetic number, because the mean of its divisors is an integer number (196962344967).

Almost surely, 2^393924689933 is an apocalyptic number.

It is an amenable number.

393924689933 is a deficient number, since it is larger than the sum of its proper divisors (1).

393924689933 is an equidigital number, since it uses as much as digits as its factorization.

393924689933 is an evil number, because the sum of its binary digits is even.

The product of its digits is 204073344, while the sum is 68.

The spelling of 393924689933 in words is "three hundred ninety-three billion, nine hundred twenty-four million, six hundred eighty-nine thousand, nine hundred thirty-three".