100340123 has 4 divisors (see below), whose sum is σ = 108058608. Its totient is φ = 92621640.

The previous prime is 100340063. The next prime is 100340143. The reversal of 100340123 is 321043001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 321043001 = 16889 ⋅19009.

It is a cyclic number.

It is not a de Polignac number, because 100340123 - 2⁸ = 100339867 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100340098 and 100340107.

It is not an unprimeable number, because it can be changed into a prime (100340143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3859223 + ... + 3859248.

It is an arithmetic number, because the mean of its divisors is an integer number (27014652).

Almost surely, 2^100340123 is an apocalyptic number.

100340123 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

100340123 is a deficient number, since it is larger than the sum of its proper divisors (7718485).

100340123 is an equidigital number, since it uses as much as digits as its factorization.

100340123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7718484.

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

The square root of 100340123 is about 10016.9917140826. The cubic root of 100340123 is about 464.6845249080.

Adding to 100340123 its reverse (321043001), we get a palindrome (421383124).

The spelling of 100340123 in words is "one hundred million, three hundred forty thousand, one hundred twenty-three".