123456790123 has 2 divisors, whose sum is σ = 123456790124. Its totient is φ = 123456790122.

The previous prime is 123456790049. The next prime is 123456790133. The reversal of 123456790123 is 321097654321.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123456790123 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 123456790123.

It is not a weakly prime, because it can be changed into another prime (123456790133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61728395061 + 61728395062.

It is an arithmetic number, because the mean of its divisors is an integer number (61728395062).

Almost surely, 2^123456790123 is an apocalyptic number.

123456790123 is a deficient number, since it is larger than the sum of its proper divisors (1).

123456790123 is an equidigital number, since it uses as much as digits as its factorization.

123456790123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 272160, while the sum is 43.

The spelling of 123456790123 in words is "one hundred twenty-three billion, four hundred fifty-six million, seven hundred ninety thousand, one hundred twenty-three".