123309477029 has 2 divisors, whose sum is σ = 123309477030. Its totient is φ = 123309477028.

The previous prime is 123309477023. The next prime is 123309477041. The reversal of 123309477029 is 920774903321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 76174896004 + 47134581025 = 275998^2 + 217105^2 .

It is a cyclic number.

It is not a de Polignac number, because 123309477029 - 2²⁴ = 123292699813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123309477023) 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, 61654738514 + 61654738515.

It is an arithmetic number, because the mean of its divisors is an integer number (61654738515).

Almost surely, 2^123309477029 is an apocalyptic number.

It is an amenable number.

123309477029 is a deficient number, since it is larger than the sum of its proper divisors (1).

123309477029 is an equidigital number, since it uses as much as digits as its factorization.

123309477029 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 571536, while the sum is 47.

The spelling of 123309477029 in words is "one hundred twenty-three billion, three hundred nine million, four hundred seventy-seven thousand, twenty-nine".