123994859 has 2 divisors, whose sum is σ = 123994860. Its totient is φ = 123994858.

The previous prime is 123994847. The next prime is 123994861. The reversal of 123994859 is 958499321.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123994859 is a prime.

Together with 123994861, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (123994879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61997429 + 61997430.

It is an arithmetic number, because the mean of its divisors is an integer number (61997430).

Almost surely, 2^123994859 is an apocalyptic number.

123994859 is a deficient number, since it is larger than the sum of its proper divisors (1).

123994859 is an equidigital number, since it uses as much as digits as its factorization.

123994859 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 699840, while the sum is 50.

The square root of 123994859 is about 11135.2978855530. The cubic root of 123994859 is about 498.6562036583.

The spelling of 123994859 in words is "one hundred twenty-three million, nine hundred ninety-four thousand, eight hundred fifty-nine".