393924996401 has 2 divisors, whose sum is σ = 393924996402. Its totient is φ = 393924996400.

The previous prime is 393924996373. The next prime is 393924996427. The reversal of 393924996401 is 104699429393.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 379796108176 + 14128888225 = 616276^2 + 118865^2 .

It is a cyclic number.

It is not a de Polignac number, because 393924996401 - 2⁶ = 393924996337 is a prime.

It is not a weakly prime, because it can be changed into another prime (393924996701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 196962498200 + 196962498201.

It is an arithmetic number, because the mean of its divisors is an integer number (196962498201).

Almost surely, 2^393924996401 is an apocalyptic number.

It is an amenable number.

393924996401 is a deficient number, since it is larger than the sum of its proper divisors (1).

393924996401 is an equidigital number, since it uses as much as digits as its factorization.

393924996401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11337408, while the sum is 59.

The spelling of 393924996401 in words is "three hundred ninety-three billion, nine hundred twenty-four million, nine hundred ninety-six thousand, four hundred one".