123650321 has 4 divisors (see below), whose sum is σ = 123676644. Its totient is φ = 123624000.

The previous prime is 123650297. The next prime is 123650339. The reversal of 123650321 is 123056321.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3857296 + 119793025 = 1964^2 + 10945^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123650321 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123650221) 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 3 ways as a sum of consecutive naturals, for example, 3980 + ... + 16221.

It is an arithmetic number, because the mean of its divisors is an integer number (30919161).

Almost surely, 2^123650321 is an apocalyptic number.

It is an amenable number.

123650321 is a deficient number, since it is larger than the sum of its proper divisors (26323).

123650321 is an equidigital number, since it uses as much as digits as its factorization.

123650321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26322.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 123650321 is about 11119.8165902141. The cubic root of 123650321 is about 498.1939119471.

The spelling of 123650321 in words is "one hundred twenty-three million, six hundred fifty thousand, three hundred twenty-one".