223478512993 has 2 divisors, whose sum is σ = 223478512994. Its totient is φ = 223478512992.

The previous prime is 223478512969. The next prime is 223478513029. The reversal of 223478512993 is 399215874322.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 189318971664 + 34159541329 = 435108^2 + 184823^2 .

It is a cyclic number.

It is not a de Polignac number, because 223478512993 - 2¹³ = 223478504801 is a prime.

It is not a weakly prime, because it can be changed into another prime (223478512913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111739256496 + 111739256497.

It is an arithmetic number, because the mean of its divisors is an integer number (111739256497).

Almost surely, 2^223478512993 is an apocalyptic number.

It is an amenable number.

223478512993 is a deficient number, since it is larger than the sum of its proper divisors (1).

223478512993 is an equidigital number, since it uses as much as digits as its factorization.

223478512993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6531840, while the sum is 55.

The spelling of 223478512993 in words is "two hundred twenty-three billion, four hundred seventy-eight million, five hundred twelve thousand, nine hundred ninety-three".