123139834 has 8 divisors (see below), whose sum is σ = 185300820. Its totient is φ = 61372896.

The previous prime is 123139813. The next prime is 123139853. The reversal of 123139834 is 438931321.

It can be written as a sum of positive squares in 2 ways, for example, as 69806025 + 53333809 = 8355^2 + 7303^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 123139834.

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, 97729 + ... + 98980.

Almost surely, 2^123139834 is an apocalyptic number.

123139834 is a deficient number, since it is larger than the sum of its proper divisors (62160986).

123139834 is a wasteful number, since it uses less digits than its factorization.

123139834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197024.

The product of its digits is 15552, while the sum is 34.

The square root of 123139834 is about 11096.8389192598. The cubic root of 123139834 is about 497.5073729369.

The spelling of 123139834 in words is "one hundred twenty-three million, one hundred thirty-nine thousand, eight hundred thirty-four".