123621879 has 8 divisors (see below), whose sum is σ = 166461552. Its totient is φ = 81598400.

The previous prime is 123621877. The next prime is 123621889. The reversal of 123621879 is 978126321.

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 123621879 - 2¹ = 123621877 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123621877) 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, 203694 + ... + 204299.

It is an arithmetic number, because the mean of its divisors is an integer number (20807694).

Almost surely, 2^123621879 is an apocalyptic number.

123621879 is a deficient number, since it is larger than the sum of its proper divisors (42839673).

123621879 is a wasteful number, since it uses less digits than its factorization.

123621879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408097.

The product of its digits is 36288, while the sum is 39.

The square root of 123621879 is about 11118.5376286632. The cubic root of 123621879 is about 498.1557108929.

It can be divided in two parts, 12362 and 1879, that added together give a palindrome (14241).

The spelling of 123621879 in words is "one hundred twenty-three million, six hundred twenty-one thousand, eight hundred seventy-nine".