103400123 has 2 divisors, whose sum is σ = 103400124. Its totient is φ = 103400122.

The previous prime is 103400113. The next prime is 103400149. The reversal of 103400123 is 321004301.

It is a weak prime.

It is an emirp because it is prime and its reverse (321004301) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 103400123 - 2⁴ = 103400107 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 103400098 and 103400107.

It is not a weakly prime, because it can be changed into another prime (103400113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51700061 + 51700062.

It is an arithmetic number, because the mean of its divisors is an integer number (51700062).

Almost surely, 2^103400123 is an apocalyptic number.

103400123 is a deficient number, since it is larger than the sum of its proper divisors (1).

103400123 is an equidigital number, since it uses as much as digits as its factorization.

103400123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 103400123 is about 10168.5851031498. The cubic root of 103400123 is about 469.3610194104.

Adding to 103400123 its reverse (321004301), we get a palindrome (424404424).

The spelling of 103400123 in words is "one hundred three million, four hundred thousand, one hundred twenty-three".