123403005 has 48 divisors (see below), whose sum is σ = 245643840. Its totient is φ = 56678400.

The previous prime is 123402973. The next prime is 123403031. The reversal of 123403005 is 500304321.

It is not a de Polignac number, because 123403005 - 2⁵ = 123402973 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2845 + ... + 15965.

It is an arithmetic number, because the mean of its divisors is an integer number (5117580).

Almost surely, 2^123403005 is an apocalyptic number.

123403005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

123403005 is a deficient number, since it is larger than the sum of its proper divisors (122240835).

123403005 is a wasteful number, since it uses less digits than its factorization.

123403005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13162 (or 13159 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 123403005 is about 11108.6905168881. The cubic root of 123403005 is about 497.8615403529.

Adding to 123403005 its reverse (500304321), we get a palindrome (623707326).

The spelling of 123403005 in words is "one hundred twenty-three million, four hundred three thousand, five".