123015349979 has 2 divisors, whose sum is σ = 123015349980. Its totient is φ = 123015349978.

The previous prime is 123015349909. The next prime is 123015350011. The reversal of 123015349979 is 979943510321.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123015349979 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 123015349979.

It is not a weakly prime, because it can be changed into another prime (123015349909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61507674989 + 61507674990.

It is an arithmetic number, because the mean of its divisors is an integer number (61507674990).

Almost surely, 2^123015349979 is an apocalyptic number.

123015349979 is a deficient number, since it is larger than the sum of its proper divisors (1).

123015349979 is an equidigital number, since it uses as much as digits as its factorization.

123015349979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1837080, while the sum is 53.

The spelling of 123015349979 in words is "one hundred twenty-three billion, fifteen million, three hundred forty-nine thousand, nine hundred seventy-nine".