393924690017 has 2 divisors, whose sum is σ = 393924690018. Its totient is φ = 393924690016.

The previous prime is 393924690011. The next prime is 393924690059. The reversal of 393924690017 is 710096429393.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 393280748641 + 643941376 = 627121^2 + 25376^2 .

It is a cyclic number.

It is not a de Polignac number, because 393924690017 - 2¹⁴ = 393924673633 is a prime.

It is a super-2 number, since 2×393924690017² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (393924690011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 196962345008 + 196962345009.

It is an arithmetic number, because the mean of its divisors is an integer number (196962345009).

Almost surely, 2^393924690017 is an apocalyptic number.

It is an amenable number.

393924690017 is a deficient number, since it is larger than the sum of its proper divisors (1).

393924690017 is an equidigital number, since it uses as much as digits as its factorization.

393924690017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2204496, while the sum is 53.

The spelling of 393924690017 in words is "three hundred ninety-three billion, nine hundred twenty-four million, six hundred ninety thousand, seventeen".