123139838 has 8 divisors (see below), whose sum is σ = 192740688. Its totient is φ = 58892944.

The previous prime is 123139813. The next prime is 123139853. The reversal of 123139838 is 838931321.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1338431 + ... + 1338522.

It is an arithmetic number, because the mean of its divisors is an integer number (24092586).

Almost surely, 2^123139838 is an apocalyptic number.

123139838 is a deficient number, since it is larger than the sum of its proper divisors (69600850).

123139838 is a wasteful number, since it uses less digits than its factorization.

123139838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2676978.

The product of its digits is 31104, while the sum is 38.

The square root of 123139838 is about 11096.8390994914. The cubic root of 123139838 is about 497.5073783238.

The spelling of 123139838 in words is "one hundred twenty-three million, one hundred thirty-nine thousand, eight hundred thirty-eight".