123661679 has 8 divisors (see below), whose sum is σ = 127073232. Its totient is φ = 120274560.

The previous prime is 123661651. The next prime is 123661691. The reversal of 123661679 is 976166321.

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

It is a cyclic number.

It is not a de Polignac number, because 123661679 - 2²⁰ = 122613103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123661619) 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, 4397 + ... + 16329.

It is an arithmetic number, because the mean of its divisors is an integer number (15884154).

Almost surely, 2^123661679 is an apocalyptic number.

123661679 is a deficient number, since it is larger than the sum of its proper divisors (3411553).

123661679 is a wasteful number, since it uses less digits than its factorization.

123661679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12217.

The product of its digits is 81648, while the sum is 41.

The square root of 123661679 is about 11120.3272883490. The cubic root of 123661679 is about 498.2091654813.

The spelling of 123661679 in words is "one hundred twenty-three million, six hundred sixty-one thousand, six hundred seventy-nine".