404071040693 has 2 divisors, whose sum is σ = 404071040694. Its totient is φ = 404071040692.

The previous prime is 404071040689. The next prime is 404071040729. The reversal of 404071040693 is 396040170404.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 251039077444 + 153031963249 = 501038^2 + 391193^2 .

It is a cyclic number.

It is not a de Polignac number, because 404071040693 - 2² = 404071040689 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (404071040683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202035520346 + 202035520347.

It is an arithmetic number, because the mean of its divisors is an integer number (202035520347).

Almost surely, 2^404071040693 is an apocalyptic number.

It is an amenable number.

404071040693 is a deficient number, since it is larger than the sum of its proper divisors (1).

404071040693 is an equidigital number, since it uses as much as digits as its factorization.

404071040693 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72576, while the sum is 38.

The spelling of 404071040693 in words is "four hundred four billion, seventy-one million, forty thousand, six hundred ninety-three".