404288351693 has 4 divisors (see below), whose sum is σ = 405433644828. Its totient is φ = 403143058560.

The previous prime is 404288351653. The next prime is 404288351711. The reversal of 404288351693 is 396153882404.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 128523684004 + 275764667689 = 358502^2 + 525133^2 .

It is a cyclic number.

It is not a de Polignac number, because 404288351693 - 2⁶ = 404288351629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404288351653) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 572646038 + ... + 572646743.

It is an arithmetic number, because the mean of its divisors is an integer number (101358411207).

Almost surely, 2^404288351693 is an apocalyptic number.

It is an amenable number.

404288351693 is a deficient number, since it is larger than the sum of its proper divisors (1145293135).

404288351693 is a wasteful number, since it uses less digits than its factorization.

404288351693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1145293134.

The product of its (nonzero) digits is 4976640, while the sum is 53.

The spelling of 404288351693 in words is "four hundred four billion, two hundred eighty-eight million, three hundred fifty-one thousand, six hundred ninety-three".