123908478069 has 8 divisors (see below), whose sum is σ = 165434867680. Its totient is φ = 82493870256.

The previous prime is 123908478061. The next prime is 123908478073. The reversal of 123908478069 is 960874809321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 123908478069 - 2³ = 123908478061 is a prime.

It is a super-2 number, since 2×123908478069² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123908478061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27942862 + ... + 27947295.

It is an arithmetic number, because the mean of its divisors is an integer number (20679358460).

Almost surely, 2^123908478069 is an apocalyptic number.

It is an amenable number.

123908478069 is a deficient number, since it is larger than the sum of its proper divisors (41526389611).

123908478069 is an equidigital number, since it uses as much as digits as its factorization.

123908478069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55890899.

The product of its (nonzero) digits is 5225472, while the sum is 57.

The spelling of 123908478069 in words is "one hundred twenty-three billion, nine hundred eight million, four hundred seventy-eight thousand, sixty-nine".