123909904 has 10 divisors (see below), whose sum is σ = 240075470. Its totient is φ = 61954944.

The previous prime is 123909893. The next prime is 123909943. The reversal of 123909904 is 409909321.

It can be written as a sum of positive squares in only one way, i.e., 103225600 + 20684304 = 10160^2 + 4548^2 .

It is an unprimeable number.

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, 3872169 + ... + 3872200.

It is an arithmetic number, because the mean of its divisors is an integer number (24007547).

Almost surely, 2^123909904 is an apocalyptic number.

It is an amenable number.

123909904 is a deficient number, since it is larger than the sum of its proper divisors (116165566).

123909904 is an equidigital number, since it uses as much as digits as its factorization.

123909904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7744377 (or 7744371 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 37.

The square root of 123909904 is about 11131.4825607374. The cubic root of 123909904 is about 498.5422929771.

The spelling of 123909904 in words is "one hundred twenty-three million, nine hundred nine thousand, nine hundred four".