123049187929 has 2 divisors, whose sum is σ = 123049187930. Its totient is φ = 123049187928.

The previous prime is 123049187897. The next prime is 123049187981. The reversal of 123049187929 is 929781940321.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 80066361600 + 42982826329 = 282960^2 + 207323^2 .

It is a cyclic number.

It is not a de Polignac number, because 123049187929 - 2⁵ = 123049187897 is a prime.

It is a super-2 number, since 2×123049187929² (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 123049187929.

It is not a weakly prime, because it can be changed into another prime (123049787929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61524593964 + 61524593965.

It is an arithmetic number, because the mean of its divisors is an integer number (61524593965).

Almost surely, 2^123049187929 is an apocalyptic number.

It is an amenable number.

123049187929 is a deficient number, since it is larger than the sum of its proper divisors (1).

123049187929 is an equidigital number, since it uses as much as digits as its factorization.

123049187929 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1959552, while the sum is 55.

The spelling of 123049187929 in words is "one hundred twenty-three billion, forty-nine million, one hundred eighty-seven thousand, nine hundred twenty-nine".