1223776493 has 2 divisors, whose sum is σ = 1223776494. Its totient is φ = 1223776492.

The previous prime is 1223776471. The next prime is 1223776531. The reversal of 1223776493 is 3946773221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1200137449 + 23639044 = 34643^2 + 4862^2 .

It is a cyclic number.

It is not a de Polignac number, because 1223776493 - 2⁸ = 1223776237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1223776403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611888246 + 611888247.

It is an arithmetic number, because the mean of its divisors is an integer number (611888247).

Almost surely, 2^1223776493 is an apocalyptic number.

It is an amenable number.

1223776493 is a deficient number, since it is larger than the sum of its proper divisors (1).

1223776493 is an equidigital number, since it uses as much as digits as its factorization.

1223776493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 381024, while the sum is 44.

The square root of 1223776493 is about 34982.5169620483. The cubic root of 1223776493 is about 1069.6311340993.

The spelling of 1223776493 in words is "one billion, two hundred twenty-three million, seven hundred seventy-six thousand, four hundred ninety-three".