123320780819 has 2 divisors, whose sum is σ = 123320780820. Its totient is φ = 123320780818.

The previous prime is 123320780797. The next prime is 123320780827. The reversal of 123320780819 is 918087023321.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 123320780819 - 2⁸ = 123320780563 is a prime.

It is a super-2 number, since 2×123320780819² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 123320780819.

It is not a weakly prime, because it can be changed into another prime (123320780879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61660390409 + 61660390410.

It is an arithmetic number, because the mean of its divisors is an integer number (61660390410).

Almost surely, 2^123320780819 is an apocalyptic number.

123320780819 is a deficient number, since it is larger than the sum of its proper divisors (1).

123320780819 is an equidigital number, since it uses as much as digits as its factorization.

123320780819 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145152, while the sum is 44.

The spelling of 123320780819 in words is "one hundred twenty-three billion, three hundred twenty million, seven hundred eighty thousand, eight hundred nineteen".