123681339 has 6 divisors (see below), whose sum is σ = 178650836. Its totient is φ = 82454220.

The previous prime is 123681323. The next prime is 123681347. The reversal of 123681339 is 933186321.

It is not a de Polignac number, because 123681339 - 2⁴ = 123681323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123681139) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6871177 + ... + 6871194.

Almost surely, 2^123681339 is an apocalyptic number.

123681339 is a deficient number, since it is larger than the sum of its proper divisors (54969497).

123681339 is a wasteful number, since it uses less digits than its factorization.

123681339 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13742377 (or 13742374 counting only the distinct ones).

The product of its digits is 23328, while the sum is 36.

The square root of 123681339 is about 11121.2112200066. The cubic root of 123681339 is about 498.2355662042.

The spelling of 123681339 in words is "one hundred twenty-three million, six hundred eighty-one thousand, three hundred thirty-nine".