123839967 has 24 divisors (see below), whose sum is σ = 178582320. Its totient is φ = 76279680.

The previous prime is 123839953. The next prime is 123839983. The reversal of 123839967 is 769938321.

It is not a de Polignac number, because 123839967 - 2⁷ = 123839839 is a prime.

It is a super-2 number, since 2×123839967² = 30672674853122178, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123839167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 43009 + ... + 45797.

It is an arithmetic number, because the mean of its divisors is an integer number (7440930).

Almost surely, 2^123839967 is an apocalyptic number.

123839967 is a deficient number, since it is larger than the sum of its proper divisors (54742353).

123839967 is a wasteful number, since it uses less digits than its factorization.

123839967 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2871 (or 2852 counting only the distinct ones).

The product of its digits is 489888, while the sum is 48.

The square root of 123839967 is about 11128.3407118941. The cubic root of 123839967 is about 498.4484798838.

The spelling of 123839967 in words is "one hundred twenty-three million, eight hundred thirty-nine thousand, nine hundred sixty-seven".