123969621 has 8 divisors (see below), whose sum is σ = 167621184. Its totient is φ = 81482240.

The previous prime is 123969619. The next prime is 123969683. The reversal of 123969621 is 126969321.

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 123969621 - 2¹ = 123969619 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 123969621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123969121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 290796 + ... + 291221.

It is an arithmetic number, because the mean of its divisors is an integer number (20952648).

Almost surely, 2^123969621 is an apocalyptic number.

It is an amenable number.

123969621 is a deficient number, since it is larger than the sum of its proper divisors (43651563).

123969621 is an equidigital number, since it uses as much as digits as its factorization.

123969621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 582091.

The product of its digits is 34992, while the sum is 39.

The square root of 123969621 is about 11134.1645847365. The cubic root of 123969621 is about 498.6223690855.

The spelling of 123969621 in words is "one hundred twenty-three million, nine hundred sixty-nine thousand, six hundred twenty-one".