123146978707 has 2 divisors, whose sum is σ = 123146978708. Its totient is φ = 123146978706.

The previous prime is 123146978683. The next prime is 123146978771. The reversal of 123146978707 is 707879641321.

It is a weak prime.

It is an emirp because it is prime and its reverse (707879641321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 123146978707 - 2⁷ = 123146978579 is a prime.

It is a super-2 number, since 2×123146978707² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (123146970707) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61573489353 + 61573489354.

It is an arithmetic number, because the mean of its divisors is an integer number (61573489354).

Almost surely, 2^123146978707 is an apocalyptic number.

123146978707 is a deficient number, since it is larger than the sum of its proper divisors (1).

123146978707 is an equidigital number, since it uses as much as digits as its factorization.

123146978707 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3556224, while the sum is 55.

The spelling of 123146978707 in words is "one hundred twenty-three billion, one hundred forty-six million, nine hundred seventy-eight thousand, seven hundred seven".