393924689071 has 2 divisors, whose sum is σ = 393924689072. Its totient is φ = 393924689070.

The previous prime is 393924689069. The next prime is 393924689143. The reversal of 393924689071 is 170986429393.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 393924689071 - 2¹ = 393924689069 is a prime.

Together with 393924689069, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (393924689021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 196962344535 + 196962344536.

It is an arithmetic number, because the mean of its divisors is an integer number (196962344536).

Almost surely, 2^393924689071 is an apocalyptic number.

393924689071 is a deficient number, since it is larger than the sum of its proper divisors (1).

393924689071 is an equidigital number, since it uses as much as digits as its factorization.

393924689071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17635968, while the sum is 61.

The spelling of 393924689071 in words is "three hundred ninety-three billion, nine hundred twenty-four million, six hundred eighty-nine thousand, seventy-one".