123939889694 has 8 divisors (see below), whose sum is σ = 185927795040. Its totient is φ = 61963958016.

The previous prime is 123939889687. The next prime is 123939889709. The reversal of 123939889694 is 496988939321.

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

It is a super-2 number, since 2×123939889694² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2967494 + ... + 3008969.

It is an arithmetic number, because the mean of its divisors is an integer number (23240974380).

Almost surely, 2^123939889694 is an apocalyptic number.

123939889694 is a deficient number, since it is larger than the sum of its proper divisors (61987905346).

123939889694 is a wasteful number, since it uses less digits than its factorization.

123939889694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5986834.

The product of its digits is 181398528, while the sum is 71.

The spelling of 123939889694 in words is "one hundred twenty-three billion, nine hundred thirty-nine million, eight hundred eighty-nine thousand, six hundred ninety-four".