123344777819 has 2 divisors, whose sum is σ = 123344777820. Its totient is φ = 123344777818.

The previous prime is 123344777653. The next prime is 123344777851. The reversal of 123344777819 is 918777443321.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 123344777819 - 2¹² = 123344773723 is a prime.

It is a super-2 number, since 2×123344777819² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (123344770819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61672388909 + 61672388910.

It is an arithmetic number, because the mean of its divisors is an integer number (61672388910).

Almost surely, 2^123344777819 is an apocalyptic number.

123344777819 is a deficient number, since it is larger than the sum of its proper divisors (1).

123344777819 is an equidigital number, since it uses as much as digits as its factorization.

123344777819 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7112448, while the sum is 56.

The spelling of 123344777819 in words is "one hundred twenty-three billion, three hundred forty-four million, seven hundred seventy-seven thousand, eight hundred nineteen".