1223551783 has 2 divisors, whose sum is σ = 1223551784. Its totient is φ = 1223551782.

The previous prime is 1223551739. The next prime is 1223551811. The reversal of 1223551783 is 3871553221.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1223551783 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1223552783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611775891 + 611775892.

It is an arithmetic number, because the mean of its divisors is an integer number (611775892).

Almost surely, 2^1223551783 is an apocalyptic number.

1223551783 is a deficient number, since it is larger than the sum of its proper divisors (1).

1223551783 is an equidigital number, since it uses as much as digits as its factorization.

1223551783 is an evil number, because the sum of its binary digits is even.

The product of its digits is 50400, while the sum is 37.

The square root of 1223551783 is about 34979.3050674252. The cubic root of 1223551783 is about 1069.5656614888.

The spelling of 1223551783 in words is "one billion, two hundred twenty-three million, five hundred fifty-one thousand, seven hundred eighty-three".