403923344893 has 2 divisors, whose sum is σ = 403923344894. Its totient is φ = 403923344892.

The previous prime is 403923344807. The next prime is 403923344897. The reversal of 403923344893 is 398443329304.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 377563549444 + 26359795449 = 614462^2 + 162357^2 .

It is a cyclic number.

It is not a de Polignac number, because 403923344893 - 2²⁵ = 403889790461 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 403923344893.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (403923344897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201961672446 + 201961672447.

It is an arithmetic number, because the mean of its divisors is an integer number (201961672447).

Almost surely, 2^403923344893 is an apocalyptic number.

It is an amenable number.

403923344893 is a deficient number, since it is larger than the sum of its proper divisors (1).

403923344893 is an equidigital number, since it uses as much as digits as its factorization.

403923344893 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6718464, while the sum is 52.

The spelling of 403923344893 in words is "four hundred three billion, nine hundred twenty-three million, three hundred forty-four thousand, eight hundred ninety-three".