123309998 has 16 divisors (see below), whose sum is σ = 212738784. Its totient is φ = 52509600.

The previous prime is 123309913. The next prime is 123310003. The reversal of 123309998 is 899903321.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25853 + ... + 30248.

It is an arithmetic number, because the mean of its divisors is an integer number (13296174).

Almost surely, 2^123309998 is an apocalyptic number.

123309998 is a deficient number, since it is larger than the sum of its proper divisors (89428786).

123309998 is a wasteful number, since it uses less digits than its factorization.

123309998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56267.

The product of its (nonzero) digits is 104976, while the sum is 44.

The square root of 123309998 is about 11104.5035008324. The cubic root of 123309998 is about 497.7364319836.

The spelling of 123309998 in words is "one hundred twenty-three million, three hundred nine thousand, nine hundred ninety-eight".