123854639 has 8 divisors (see below), whose sum is σ = 131518080. Its totient is φ = 116233216.

The previous prime is 123854623. The next prime is 123854657. The reversal of 123854639 is 936458321.

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

It is not a de Polignac number, because 123854639 - 2⁴ = 123854623 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123854596 and 123854605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123854239) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4319 + ... + 16320.

It is an arithmetic number, because the mean of its divisors is an integer number (16439760).

Almost surely, 2^123854639 is an apocalyptic number.

123854639 is a deficient number, since it is larger than the sum of its proper divisors (7663441).

123854639 is a wasteful number, since it uses less digits than its factorization.

123854639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21009.

The product of its digits is 155520, while the sum is 41.

The square root of 123854639 is about 11128.9999101447. Note that the first 4 decimals coincide. The cubic root of 123854639 is about 498.4681637480.

The spelling of 123854639 in words is "one hundred twenty-three million, eight hundred fifty-four thousand, six hundred thirty-nine".