1223445679 has 2 divisors, whose sum is σ = 1223445680. Its totient is φ = 1223445678.

The previous prime is 1223445667. The next prime is 1223445683. The reversal of 1223445679 is 9765443221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1223445679 - 2²³ = 1215057071 is a prime.

It is a plaindrome in base 10.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1223445779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611722839 + 611722840.

It is an arithmetic number, because the mean of its divisors is an integer number (611722840).

Almost surely, 2^1223445679 is an apocalyptic number.

1223445679 is a deficient number, since it is larger than the sum of its proper divisors (1).

1223445679 is an equidigital number, since it uses as much as digits as its factorization.

1223445679 is an evil number, because the sum of its binary digits is even.

The product of its digits is 362880, while the sum is 43.

The square root of 1223445679 is about 34977.7883663333. The cubic root of 1223445679 is about 1069.5347437194.

The spelling of 1223445679 in words is "one billion, two hundred twenty-three million, four hundred forty-five thousand, six hundred seventy-nine".