393935892473 has 2 divisors, whose sum is σ = 393935892474. Its totient is φ = 393935892472.

The previous prime is 393935892463. The next prime is 393935892509. The reversal of 393935892473 is 374298539393.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 262622426089 + 131313466384 = 512467^2 + 362372^2 .

It is an emirp because it is prime and its reverse (374298539393) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 393935892473 - 2⁶ = 393935892409 is a prime.

It is not a weakly prime, because it can be changed into another prime (393935892463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 196967946236 + 196967946237.

It is an arithmetic number, because the mean of its divisors is an integer number (196967946237).

Almost surely, 2^393935892473 is an apocalyptic number.

It is an amenable number.

393935892473 is a deficient number, since it is larger than the sum of its proper divisors (1).

393935892473 is an equidigital number, since it uses as much as digits as its factorization.

393935892473 is an evil number, because the sum of its binary digits is even.

The product of its digits is 132269760, while the sum is 65.

The spelling of 393935892473 in words is "three hundred ninety-three billion, nine hundred thirty-five million, eight hundred ninety-two thousand, four hundred seventy-three".